diff --git a/frontend/src/app/app-routing.module.ts b/frontend/src/app/app-routing.module.ts
index 7a23e7556..5262a431a 100644
--- a/frontend/src/app/app-routing.module.ts
+++ b/frontend/src/app/app-routing.module.ts
@@ -53,6 +53,44 @@ let routes: Routes = [
       },
     ]
   },
+  {
+    path: 'testnet4',
+    children: [
+      {
+        path: '',
+        pathMatch: 'full',
+        loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
+        data: { preload: true },
+      },
+      {
+        path: '',
+        loadChildren: () => import('./master-page.module').then(m => m.MasterPageModule),
+        data: { preload: true },
+      },
+      {
+        path: 'wallet',
+        children: [],
+        component: AddressGroupComponent,
+        data: {
+          networkSpecific: true,
+        }
+      },
+      {
+        path: 'status',
+        data: { networks: ['bitcoin', 'liquid'] },
+        component: StatusViewComponent
+      },
+      {
+        path: '',
+        loadChildren: () => import('./bitcoin-graphs.module').then(m => m.BitcoinGraphsModule),
+        data: { preload: true },
+      },
+      {
+        path: '**',
+        redirectTo: '/testnet4'
+      },
+    ]
+  },
   {
     path: 'signet',
     children: [
diff --git a/frontend/src/app/app.constants.ts b/frontend/src/app/app.constants.ts
index bd81d02c0..aaa53b8ba 100644
--- a/frontend/src/app/app.constants.ts
+++ b/frontend/src/app/app.constants.ts
@@ -189,22 +189,22 @@ export const specialBlocks = {
   '0': {
     labelEvent: 'Genesis',
     labelEventCompleted: 'The Genesis of Bitcoin',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '210000': {
     labelEvent: 'Bitcoin\'s 1st Halving',
     labelEventCompleted: 'Block Subsidy has halved to 25 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '420000': {
     labelEvent: 'Bitcoin\'s 2nd Halving',
     labelEventCompleted: 'Block Subsidy has halved to 12.5 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '630000': {
     labelEvent: 'Bitcoin\'s 3rd Halving',
     labelEventCompleted: 'Block Subsidy has halved to 6.25 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '709632': {
     labelEvent: 'Taproot 🌱 activation',
@@ -214,62 +214,62 @@ export const specialBlocks = {
   '840000': {
     labelEvent: 'Bitcoin\'s 4th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 3.125 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '1050000': {
     labelEvent: 'Bitcoin\'s 5th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 1.5625 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '1260000': {
     labelEvent: 'Bitcoin\'s 6th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.78125 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '1470000': {
     labelEvent: 'Bitcoin\'s 7th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.390625 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '1680000': {
     labelEvent: 'Bitcoin\'s 8th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.1953125 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '1890000': {
     labelEvent: 'Bitcoin\'s 9th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.09765625 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '2100000': {
     labelEvent: 'Bitcoin\'s 10th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.04882812 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '2310000': {
     labelEvent: 'Bitcoin\'s 11th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.02441406 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '2520000': {
     labelEvent: 'Bitcoin\'s 12th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.01220703 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '2730000': {
     labelEvent: 'Bitcoin\'s 13th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.00610351 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '2940000': {
     labelEvent: 'Bitcoin\'s 14th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.00305175 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   },
   '3150000': {
     labelEvent: 'Bitcoin\'s 15th Halving',
     labelEventCompleted: 'Block Subsidy has halved to 0.00152587 BTC per block',
-    networks: ['mainnet', 'testnet'],
+    networks: ['mainnet', 'testnet', 'testnet4'],
   }
 };
 
diff --git a/frontend/src/app/bitcoin.utils.ts b/frontend/src/app/bitcoin.utils.ts
index d5b5122fa..b9f4f39e1 100644
--- a/frontend/src/app/bitcoin.utils.ts
+++ b/frontend/src/app/bitcoin.utils.ts
@@ -266,6 +266,11 @@ const featureActivation = {
     segwit: 872730,
     taproot: 2032291,
   },
+  testnet4: {
+    rbf: 0,
+    segwit: 0,
+    taproot: 0,
+  },
   signet: {
     rbf: 0,
     segwit: 0,
diff --git a/frontend/src/app/components/amount/amount.component.html b/frontend/src/app/components/amount/amount.component.html
index f157d17d6..b38cf4c41 100644
--- a/frontend/src/app/components/amount/amount.component.html
+++ b/frontend/src/app/components/amount/amount.component.html
@@ -43,5 +43,6 @@
   <ng-template [ngIf]="network === 'liquid' && !forceBtc">L-</ng-template>
   <ng-template [ngIf]="network === 'liquidtestnet'">tL-</ng-template>
   <ng-template [ngIf]="network === 'testnet'">t</ng-template>
+  <ng-template [ngIf]="network === 'testnet4'">t</ng-template>
   <ng-template [ngIf]="network === 'signet'">s</ng-template>
 </ng-template>
diff --git a/frontend/src/app/components/blockchain-blocks/blockchain-blocks.component.ts b/frontend/src/app/components/blockchain-blocks/blockchain-blocks.component.ts
index 35499f162..1d0e284f8 100644
--- a/frontend/src/app/components/blockchain-blocks/blockchain-blocks.component.ts
+++ b/frontend/src/app/components/blockchain-blocks/blockchain-blocks.component.ts
@@ -70,6 +70,7 @@ export class BlockchainBlocksComponent implements OnInit, OnChanges, OnDestroy {
     liquid: ['var(--liquid)', 'var(--testnet-alt)'],
     'liquidtestnet': ['var(--liquidtestnet)', 'var(--liquidtestnet-alt)'],
     testnet: ['var(--testnet)', 'var(--testnet-alt)'],
+    testnet4: ['var(--testnet)', 'var(--testnet-alt)'],
     signet: ['var(--signet)', 'var(--signet-alt)'],
   };
 
diff --git a/frontend/src/app/components/clock/clock.component.ts b/frontend/src/app/components/clock/clock.component.ts
index 94ff3e810..90f24a753 100644
--- a/frontend/src/app/components/clock/clock.component.ts
+++ b/frontend/src/app/components/clock/clock.component.ts
@@ -36,6 +36,7 @@ export class ClockComponent implements OnInit {
     liquid: ['#116761', '#183550'],
     'liquidtestnet': ['#494a4a', '#272e46'],
     testnet: ['#1d486f', '#183550'],
+    testnet4: ['#1d486f', '#183550'],
     signet: ['#6f1d5d', '#471850'],
   };
 
diff --git a/frontend/src/app/components/liquid-master-page/liquid-master-page.component.html b/frontend/src/app/components/liquid-master-page/liquid-master-page.component.html
index 7d826ca87..b2dd0344b 100644
--- a/frontend/src/app/components/liquid-master-page/liquid-master-page.component.html
+++ b/frontend/src/app/components/liquid-master-page/liquid-master-page.component.html
@@ -51,7 +51,8 @@
     <div ngbDropdownMenu [ngClass]="{'dropdown-menu-right' : isMobile}">
       <a [href]="env.MEMPOOL_WEBSITE_URL + urlLanguage + (networkPaths['mainnet'] || '')" ngbDropdownItem class="mainnet"><app-svg-images name="bitcoin" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Mainnet</a>
       <a [href]="env.MEMPOOL_WEBSITE_URL + urlLanguage + (networkPaths['signet'] || '/signet')" ngbDropdownItem *ngIf="env.SIGNET_ENABLED" class="signet"><app-svg-images name="signet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Signet</a>
-      <a [href]="env.MEMPOOL_WEBSITE_URL + urlLanguage + (networkPaths['testnet'] || '/testnet')" ngbDropdownItem *ngIf="env.TESTNET_ENABLED" class="testnet"><app-svg-images name="testnet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet</a>
+      <a [href]="env.MEMPOOL_WEBSITE_URL + urlLanguage + (networkPaths['testnet'] || '/testnet')" ngbDropdownItem *ngIf="env.TESTNET_ENABLED" class="testnet"><app-svg-images name="testnet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet3</a>
+      <a [href]="env.MEMPOOL_WEBSITE_URL + urlLanguage + (networkPaths['testnet4'] || '/testnet4')" ngbDropdownItem *ngIf="env.TESTNET4_ENABLED" class="testnet"><app-svg-images name="testnet4" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet4 <span class="badge badge-pill badge-warning beta-network" i18n="beta">beta</span></a>
       <h6 class="dropdown-header" i18n="master-page.layer2-networks-header">Layer 2 Networks</h6>
       <a ngbDropdownItem class="liquid mr-1" [class.active]="network.val === 'liquid'" [routerLink]="networkPaths['liquid'] || '/'"><app-svg-images name="liquid" width="22" height="22" viewBox="0 0 125 125" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Liquid</a>
       <a ngbDropdownItem *ngIf="env.LIQUID_TESTNET_ENABLED" class="liquidtestnet" [class.active]="network.val === 'liquidtestnet'" [routerLink]="networkPaths['liquidtestnet'] || '/testnet'"><app-svg-images name="liquidtestnet" width="22" height="22" viewBox="0 0 125 125" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Liquid Testnet</a>
diff --git a/frontend/src/app/components/liquid-master-page/liquid-master-page.component.scss b/frontend/src/app/components/liquid-master-page/liquid-master-page.component.scss
index af7f53770..b0f3ce9c6 100644
--- a/frontend/src/app/components/liquid-master-page/liquid-master-page.component.scss
+++ b/frontend/src/app/components/liquid-master-page/liquid-master-page.component.scss
@@ -169,4 +169,8 @@ nav {
     margin-left: 5px;
     margin-right: 0px;
   }
+}
+
+.beta-network {
+  font-size: 8px;
 }
\ No newline at end of file
diff --git a/frontend/src/app/components/master-page-preview/master-page-preview.component.html b/frontend/src/app/components/master-page-preview/master-page-preview.component.html
index 36e8eed10..49efce400 100644
--- a/frontend/src/app/components/master-page-preview/master-page-preview.component.html
+++ b/frontend/src/app/components/master-page-preview/master-page-preview.component.html
@@ -15,7 +15,8 @@
 
     <div [ngSwitch]="network.val">
       <span *ngSwitchCase="'signet'" class="network signet"><app-svg-images name="signet" width="35" height="35" viewBox="0 0 65 65" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Signet</span>
-      <span *ngSwitchCase="'testnet'" class="network testnet"><app-svg-images name="testnet" width="35" height="35" viewBox="0 0 65 65" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Testnet</span>
+      <span *ngSwitchCase="'testnet'" class="network testnet"><app-svg-images name="testnet" width="35" height="35" viewBox="0 0 65 65" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Testnet3</span>
+      <span *ngSwitchCase="'testnet4'" class="network testnet"><app-svg-images name="testnet4" width="35" height="35" viewBox="0 0 65 65" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Testnet4</span>
       <span *ngSwitchCase="'liquid'" class="network liquid"><app-svg-images name="liquid" width="35" height="35" viewBox="0 0 125 125" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Mainnet</span>
       <span *ngSwitchCase="'liquidtestnet'" class="network liquidtestnet"><app-svg-images name="liquidtestnet" width="35" height="35" viewBox="0 0 125 125" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Testnet</span>
       <span *ngSwitchDefault class="network mainnet"><app-svg-images name="bitcoin" width="35" height="35" viewBox="0 0 65 65" style="width: 40px; height: 48px;" class="mainnet mr-1"></app-svg-images> Mainnet</span>
diff --git a/frontend/src/app/components/master-page/master-page.component.html b/frontend/src/app/components/master-page/master-page.component.html
index 5da892f4a..18fbeac68 100644
--- a/frontend/src/app/components/master-page/master-page.component.html
+++ b/frontend/src/app/components/master-page/master-page.component.html
@@ -58,14 +58,15 @@
     </ng-container>
   </a>
 
-  <div (window:resize)="onResize()" ngbDropdown class="dropdown-container" *ngIf="env.TESTNET_ENABLED || env.SIGNET_ENABLED || env.LIQUID_ENABLED || env.LIQUID_TESTNET_ENABLED">
+  <div (window:resize)="onResize()" ngbDropdown class="dropdown-container" *ngIf="env.TESTNET_ENABLED || env.TESTNET4_ENABLED || env.SIGNET_ENABLED || env.LIQUID_ENABLED || env.LIQUID_TESTNET_ENABLED">
     <button ngbDropdownToggle type="button" class="btn btn-secondary dropdown-toggle-split d-flex justify-content-center align-items-center" aria-haspopup="true">
       <app-svg-images class="d-flex justify-content-center align-items-center current-network-svg" [name]="network.val === '' ? 'bitcoin' : network.val" width="20" height="20" viewBox="0 0 65 65"></app-svg-images>
     </button>
     <div ngbDropdownMenu [ngClass]="{'dropdown-menu-right' : isMobile}">
       <a ngbDropdownItem class="mainnet" [routerLink]="networkPaths['mainnet'] || '/'"><app-svg-images name="bitcoin" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Mainnet</a>
       <a ngbDropdownItem *ngIf="env.SIGNET_ENABLED" class="signet" [class.active]="network.val === 'signet'" [routerLink]="networkPaths['signet'] || '/signet'"><app-svg-images name="signet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Signet</a>
-      <a ngbDropdownItem *ngIf="env.TESTNET_ENABLED" class="testnet" [class.active]="network.val === 'testnet'" [routerLink]="networkPaths['testnet'] || '/testnet'"><app-svg-images name="testnet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet</a>
+      <a ngbDropdownItem *ngIf="env.TESTNET_ENABLED" class="testnet" [class.active]="network.val === 'testnet'" [routerLink]="networkPaths['testnet'] || '/testnet'"><app-svg-images name="testnet" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet3</a>
+      <a ngbDropdownItem *ngIf="env.TESTNET4_ENABLED" class="testnet" [class.active]="network.val === 'testnet4'" [routerLink]="networkPaths['testnet4'] || '/testnet4'"><app-svg-images name="testnet4" width="22" height="22" viewBox="0 0 65 65" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Testnet4 <span class="badge badge-pill badge-warning beta-network" i18n="beta">beta</span></a>
       <h6 *ngIf="env.LIQUID_ENABLED" class="dropdown-header" i18n="master-page.layer2-networks-header">Layer 2 Networks</h6>
       <a [href]="env.LIQUID_WEBSITE_URL + urlLanguage + (networkPaths['liquid'] || '')" ngbDropdownItem *ngIf="env.LIQUID_ENABLED" class="liquid" [class.active]="network.val === 'liquid'"><app-svg-images name="liquid" width="22" height="22" viewBox="0 0 125 125" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Liquid</a>
       <a [href]="env.LIQUID_WEBSITE_URL + urlLanguage  + (networkPaths['liquidtestnet'] || '/testnet')" ngbDropdownItem *ngIf="env.LIQUID_TESTNET_ENABLED" class="liquidtestnet" [class.active]="network.val === 'liquid'"><app-svg-images name="liquidtestnet" width="22" height="22" viewBox="0 0 125 125" style="width: 25px; height: 25px;" class="mainnet mr-1"></app-svg-images> Liquid Testnet</a>
@@ -87,7 +88,7 @@
       <li class="nav-item" routerLinkActive="active" [routerLinkActiveOptions]="{exact: true}" id="btn-pools" *ngIf="stateService.env.MINING_DASHBOARD">
         <a class="nav-link" [routerLink]="['/mining' | relativeUrl]" (click)="collapse()"><fa-icon [icon]="['fas', 'hammer']" [fixedWidth]="true" i18n-title="mining.mining-dashboard" title="Mining Dashboard"></fa-icon></a>
       </li>
-      <li class="nav-item" routerLinkActive="active" [routerLinkActiveOptions]="{exact: true}" id="btn-lightning" *ngIf="stateService.env.LIGHTNING">
+      <li class="nav-item" routerLinkActive="active" [routerLinkActiveOptions]="{exact: true}" id="btn-lightning" *ngIf="stateService.env.LIGHTNING && lightningNetworks.includes(stateService.network)">
         <a class="nav-link" [routerLink]="['/lightning' | relativeUrl]" (click)="collapse()"><fa-icon [icon]="['fas', 'bolt']" [fixedWidth]="true" i18n-title="master-page.lightning" title="Lightning Explorer"></fa-icon>
         </a>
       </li>
@@ -114,7 +115,7 @@
   <div class="empty-sidenav"><!-- empty sidenav needed to push footer down the screen --></div>
 
   <div class="flex-grow-1 d-flex flex-column">
-    <app-testnet-alert *ngIf="network.val === 'testnet' || network.val === 'signet'"></app-testnet-alert>
+    <app-testnet-alert *ngIf="network.val === 'testnet' || network.val === 'testnet4' || network.val === 'signet'"></app-testnet-alert>
 
     <main style="min-width: 375px; max-width: 100vw">
       <router-outlet></router-outlet>
diff --git a/frontend/src/app/components/master-page/master-page.component.scss b/frontend/src/app/components/master-page/master-page.component.scss
index 77fe49927..8704d193a 100644
--- a/frontend/src/app/components/master-page/master-page.component.scss
+++ b/frontend/src/app/components/master-page/master-page.component.scss
@@ -243,6 +243,10 @@ nav {
   }
 }
 
+.beta-network {
+  font-size: 8px;
+}
+
 .current-network-svg {
   width: 20px;
   height: 20px;
diff --git a/frontend/src/app/components/master-page/master-page.component.ts b/frontend/src/app/components/master-page/master-page.component.ts
index f3472f204..fc10a9e44 100644
--- a/frontend/src/app/components/master-page/master-page.component.ts
+++ b/frontend/src/app/components/master-page/master-page.component.ts
@@ -27,6 +27,7 @@ export class MasterPageComponent implements OnInit, OnDestroy {
   subdomain = '';
   networkPaths: { [network: string]: string };
   networkPaths$: Observable<Record<string, string>>;
+  lightningNetworks = ['', 'mainnet', 'bitcoin', 'testnet', 'signet'];
   footerVisible = true;
   user: any = undefined;
   servicesEnabled = false;
diff --git a/frontend/src/app/components/search-form/search-form.component.ts b/frontend/src/app/components/search-form/search-form.component.ts
index 8f5e65f96..fe073564e 100644
--- a/frontend/src/app/components/search-form/search-form.component.ts
+++ b/frontend/src/app/components/search-form/search-form.component.ts
@@ -179,7 +179,7 @@ export class SearchFormComponent implements OnInit {
           const lightningResults = result[1];
 
           // Do not show date and timestamp results for liquid
-          const isNetworkBitcoin = this.network === '' || this.network === 'testnet' || this.network === 'signet';
+          const isNetworkBitcoin = this.network === '' || this.network === 'testnet' || this.network === 'testnet4' || this.network === 'signet';
 
           const matchesBlockHeight = this.regexBlockheight.test(searchText) && parseInt(searchText) <= this.stateService.latestBlockHeight;
           const matchesDateTime = this.regexDate.test(searchText) && new Date(searchText).toString() !== 'Invalid Date' && new Date(searchText).getTime() <= Date.now() && isNetworkBitcoin;
diff --git a/frontend/src/app/components/svg-images/svg-images.component.html b/frontend/src/app/components/svg-images/svg-images.component.html
index 3fe3f56c8..395bbcc53 100644
--- a/frontend/src/app/components/svg-images/svg-images.component.html
+++ b/frontend/src/app/components/svg-images/svg-images.component.html
@@ -60,6 +60,9 @@
   <ng-container *ngSwitchCase="'testnet'">
     <ng-component *ngTemplateOutlet="bitcoinLogo; context: {$implicit: '#5fd15c', width, height, viewBox}"></ng-component>
   </ng-container>
+  <ng-container *ngSwitchCase="'testnet4'">
+    <ng-component *ngTemplateOutlet="bitcoinLogo; context: {$implicit: '#5fd15c', width, height, viewBox}"></ng-component>
+  </ng-container>
   <ng-container *ngSwitchCase="'liquid'">
     <ng-component *ngTemplateOutlet="liquidLogo; context: {$implicit: '', width, height, viewBox, color1: '#2cccbf', color2: '#9ef2ed'}"></ng-component>
   </ng-container>
diff --git a/frontend/src/app/components/tracker/tracker.component.html b/frontend/src/app/components/tracker/tracker.component.html
index c75e6fec6..4a726f28e 100644
--- a/frontend/src/app/components/tracker/tracker.component.html
+++ b/frontend/src/app/components/tracker/tracker.component.html
@@ -5,7 +5,8 @@
           <app-svg-images name="officialMempoolSpace" style="width: 144px; height: 36px" width="500" height="126" viewBox="0 0 500 126"></app-svg-images>
           <div [ngSwitch]="network" class="network-label">
             <span *ngSwitchCase="'signet'" class="network signet"><span class="name">Bitcoin Signet</span><app-svg-images name="signet" width="35" height="35" viewBox="0 0 65 65" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
-            <span *ngSwitchCase="'testnet'" class="network testnet"><span class="name">Bitcoin Testnet</span><app-svg-images name="testnet" width="35" height="35" viewBox="0 0 65 65" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
+            <span *ngSwitchCase="'testnet'" class="network testnet"><span class="name">Bitcoin Testnet3</span><app-svg-images name="testnet" width="35" height="35" viewBox="0 0 65 65" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
+            <span *ngSwitchCase="'testnet4'" class="network testnet"><span class="name">Bitcoin Testnet4</span><app-svg-images name="testnet4" width="35" height="35" viewBox="0 0 65 65" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
             <span *ngSwitchCase="'liquid'" class="network liquid"><span class="name">Liquid</span><app-svg-images name="liquid" width="35" height="35" viewBox="0 0 125 125" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
             <span *ngSwitchCase="'liquidtestnet'" class="network liquidtestnet"><span class="name">Liquid Testnet</span><app-svg-images name="liquidtestnet" width="35" height="35" viewBox="0 0 125 125" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
             <span *ngSwitchDefault class="network mainnet"><span class="name">Bitcoin</span><app-svg-images name="bitcoin" width="35" height="35" viewBox="0 0 65 65" style="display: inline-block" class="mainnet ml-2"></app-svg-images></span>
diff --git a/frontend/src/app/components/tx-bowtie-graph/tx-bowtie-graph.component.ts b/frontend/src/app/components/tx-bowtie-graph/tx-bowtie-graph.component.ts
index 9bbca05dd..30e85a6e7 100644
--- a/frontend/src/app/components/tx-bowtie-graph/tx-bowtie-graph.component.ts
+++ b/frontend/src/app/components/tx-bowtie-graph/tx-bowtie-graph.component.ts
@@ -91,6 +91,7 @@ export class TxBowtieGraphComponent implements OnInit, OnChanges {
     'liquidtestnet': ['#d2d2d2', '#979797', '#d2d2d200'],
     // testnet: ['#1d486f', '#183550'],
     testnet: ['#4edf77', '#10a0af', '#4edf7700'],
+    testnet4: ['#4edf77', '#10a0af', '#4edf7700'],
     // signet: ['#6f1d5d', '#471850'],
     signet: ['#d24fc8', '#a84fd2', '#d24fc800'],
   };
diff --git a/frontend/src/app/docs/api-docs/api-docs-data.ts b/frontend/src/app/docs/api-docs/api-docs-data.ts
index f4b4dfe04..c337b7520 100644
--- a/frontend/src/app/docs/api-docs/api-docs-data.ts
+++ b/frontend/src/app/docs/api-docs/api-docs-data.ts
@@ -1,5 +1,6 @@
-const bitcoinNetworks = ["", "testnet", "signet"];
+const bitcoinNetworks = ["", "testnet", "testnet4", "signet"];
 const liquidNetworks = ["liquid", "liquidtestnet"];
+const lightningNetworks = ["", "testnet", "signet"];
 const miningTimeIntervals = "<code>24h</code>, <code>3d</code>, <code>1w</code>, <code>1m</code>, <code>3m</code>, <code>6m</code>, <code>1y</code>, <code>2y</code>, <code>3y</code>";
 
 const emptyCodeSample = {
@@ -6513,7 +6514,7 @@ export const restApiDocsData = [
     category: "lightning",
     fragment: "lightning",
     title: "Lightning",
-    showConditions: bitcoinNetworks
+    showConditions: lightningNetworks
   },
   {
     type: "endpoint",
@@ -6525,7 +6526,7 @@ export const restApiDocsData = [
       default: "<p>Returns network-wide stats such as total number of channels and nodes, total capacity, and average/median fee figures.</p><p>Pass one of the following for <code>:interval</code>: <code>latest</code>, <code>24h</code>, <code>3d</code>, <code>1w</code>, <code>1m</code>, <code>3m</code>, <code>6m</code>, <code>1y</code>, <code>2y</code>, <code>3y</code>.</p>"
     },
     urlString: "/v1/lightning/statistics/:interval",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -6621,7 +6622,7 @@ export const restApiDocsData = [
       default: "<p>Returns Lightning nodes and channels that match a full-text, case-insensitive search <code>:query</code> across node aliases, node pubkeys, channel IDs, and short channel IDs.</p>"
     },
     urlString: "/v1/lightning/search?searchText=:query",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -6706,7 +6707,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of Lightning nodes running on clearnet in the requested <code>:country</code>, where <code>:country</code> is an ISO Alpha-2 country code.</p>"
     },
     urlString: "/v1/lightning/nodes/country/:country",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -6928,7 +6929,7 @@ export const restApiDocsData = [
       default: "<p>Returns aggregate capacity and number of clearnet nodes per country. Capacity figures are in satoshis.</p>"
     },
     urlString: "/v1/lightning/nodes/countries",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7072,7 +7073,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of nodes hosted by a specified <code>:isp</code>, where <code>:isp</code> is an ISP's ASN.</p>"
     },
     urlString: "/v1/lightning/nodes/isp/:isp",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7191,7 +7192,7 @@ export const restApiDocsData = [
       default: "<p>Returns aggregate capacity, number of nodes, and number of channels per ISP. Capacity figures are in satoshis.</p>"
     },
     urlString: "/v1/lightning/nodes/isp-ranking",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7303,7 +7304,7 @@ export const restApiDocsData = [
       default: "<p>Returns two lists of the top 100 nodes: one ordered by liquidity (aggregate channel capacity) and the other ordered by connectivity (number of open channels).</p>"
     },
     urlString: "/v1/lightning/nodes/rankings",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7426,7 +7427,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of the top 100 nodes by liquidity (aggregate channel capacity).</p>"
     },
     urlString: "/v1/lightning/nodes/rankings/liquidity",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7623,7 +7624,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of the top 100 nodes by connectivity (number of open channels).</p>"
     },
     urlString: "/v1/lightning/nodes/rankings/connectivity",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -7819,7 +7820,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of the top 100 oldest nodes.</p>"
     },
     urlString: "/v1/lightning/nodes/rankings/age",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8006,7 +8007,7 @@ export const restApiDocsData = [
       default: "<p>Returns details about a node with the given <code>:pubKey</code>.</p>"
     },
     urlString: "/v1/lightning/nodes/:pubKey",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8170,7 +8171,7 @@ export const restApiDocsData = [
       default: "<p>Returns historical stats for a node with the given <code>:pubKey</code>.</p>"
     },
     urlString: "/v1/lightning/nodes/:pubKey/statistics",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8268,7 +8269,7 @@ export const restApiDocsData = [
       default: "<p>Returns info about a Lightning channel with the given <code>:channelId</code>.</p>"
     },
     urlString: "/v1/lightning/channels/:channelId",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8433,7 +8434,7 @@ export const restApiDocsData = [
       default: "<p>Returns channels that correspond to the given <code>:txid</code> (multiple transaction IDs can be specified).</p>"
     },
     urlString: "/v1/lightning/channels/txids?txId[]=:txid",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8634,7 +8635,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of a node's channels given its <code>:pubKey</code>. Ten channels are returned at a time. Use <code>:index</code> for paging. <code>:channelStatus</code> can be <code>open</code>, <code>active</code>, or <code>closed</code>.</p>"
     },
     urlString: "/v1/lightning/channels?public_key=:pubKey&status=:channelStatus",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8770,7 +8771,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of channels with corresponding node geodata.</p>"
     },
     urlString: "/v1/lightning/channels-geo",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
@@ -8878,7 +8879,7 @@ export const restApiDocsData = [
       default: "<p>Returns a list of channels with corresponding geodata for a node with the given <code>:pubKey</code>.</p>"
     },
     urlString: "/v1/lightning/channels-geo/:pubKey",
-    showConditions: bitcoinNetworks,
+    showConditions: lightningNetworks,
     showJsExamples: showJsExamplesDefaultFalse,
     codeExample: {
       default: {
diff --git a/frontend/src/app/docs/api-docs/api-docs.component.html b/frontend/src/app/docs/api-docs/api-docs.component.html
index a6a98018d..f6fad9ee3 100644
--- a/frontend/src/app/docs/api-docs/api-docs.component.html
+++ b/frontend/src/app/docs/api-docs/api-docs.component.html
@@ -133,7 +133,7 @@
           <p>{{electrsPort}}</p>
           <p class="subtitle">SSL</p>
           <p>Enabled</p>
-          <p class="note" *ngIf="network.val !== 'signet'">Electrum RPC interface for Bitcoin Signet is <a href="/signet/docs/api/electrs">publicly available</a>. Electrum RPC interface for all other networks is available to <a href='https://mempool.space/enterprise'>sponsors</a> only—whitelisting is required.</p>
+          <p class="note" *ngIf="network.val !== 'signet' && network.val !== 'testnet4'">Electrum RPC interface for <a href="/signet/docs/api/electrs">Bitcoin Signet</a> and <a href="/testnet4/docs/api/electrs">Bitcoin Testnet4</a> is publicly available. Electrum RPC interface for all other networks is available to <a href='https://mempool.space/enterprise'>sponsors</a> only—whitelisting is required.</p>
         </div>
       </div>
     </div>
diff --git a/frontend/src/app/docs/api-docs/api-docs.component.ts b/frontend/src/app/docs/api-docs/api-docs.component.ts
index dd2681ca8..76d9de8d0 100644
--- a/frontend/src/app/docs/api-docs/api-docs.component.ts
+++ b/frontend/src/app/docs/api-docs/api-docs.component.ts
@@ -102,6 +102,8 @@ export class ApiDocsComponent implements OnInit, AfterViewInit {
           this.electrsPort = 50002; break;
         case "testnet":
           this.electrsPort = 60002; break;
+        case "testnet4":
+          this.electrsPort = 40002; break;
         case "signet":
           this.electrsPort = 60602; break;
         case "liquid":
@@ -170,6 +172,9 @@ export class ApiDocsComponent implements OnInit, AfterViewInit {
     if (network === 'testnet') {
       curlResponse = code.codeSampleTestnet.curl;
     }
+    if (network === 'testnet4') {
+      curlResponse = code.codeSampleTestnet.curl;
+    }
     if (network === 'signet') {
       curlResponse = code.codeSampleSignet.curl;
     }
diff --git a/frontend/src/app/docs/code-template/code-template.component.ts b/frontend/src/app/docs/code-template/code-template.component.ts
index 395f6a297..bd03f5b16 100644
--- a/frontend/src/app/docs/code-template/code-template.component.ts
+++ b/frontend/src/app/docs/code-template/code-template.component.ts
@@ -111,7 +111,10 @@ export class CodeTemplateComponent implements OnInit {
         codeText = this.replaceJSPlaceholder(codeText, code.codeSampleMainnet.esModule);
       }
       if (this.network === 'testnet') {
-      codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
+        codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
+      }
+      if (this.network === 'testnet4') {
+        codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
       }
       if (this.network === 'signet') {
         codeText = this.replaceJSPlaceholder(codeText, code.codeSampleSignet.esModule);
@@ -144,7 +147,10 @@ init();`;
         codeText = this.replaceJSPlaceholder(codeText, code.codeSampleMainnet.esModule);
       }
       if (this.network === 'testnet') {
-      codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
+        codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
+      }
+      if (this.network === 'testnet4') {
+        codeText = this.replaceJSPlaceholder(codeText, code.codeSampleTestnet.esModule);
       }
       if (this.network === 'signet') {
         codeText = this.replaceJSPlaceholder(codeText, code.codeSampleSignet.esModule);
@@ -212,6 +218,9 @@ yarn add @mempool/liquid.js`;
       if (this.network === 'testnet') {
         return this.replaceCurlPlaceholder(code.codeTemplate.curl, code.codeSampleTestnet);
       }
+      if (this.network === 'testnet4') {
+        return this.replaceCurlPlaceholder(code.codeTemplate.curl, code.codeSampleTestnet);
+      }
       if (this.network === 'signet') {
         return this.replaceCurlPlaceholder(code.codeTemplate.curl, code.codeSampleSignet);
       }
@@ -234,6 +243,9 @@ yarn add @mempool/liquid.js`;
     if (this.network === 'testnet') {
       return code.codeSampleTestnet.response;
     }
+    if (this.network === 'testnet4') {
+      return code.codeSampleTestnet.response;
+    }
     if (this.network === 'signet') {
       return code.codeSampleSignet.response;
     }
@@ -247,7 +259,7 @@ yarn add @mempool/liquid.js`;
   }
 
   wrapPythonTemplate(code: any) {
-    return ( ( this.network === 'testnet' || this.network === 'signet' ) ? ( code.codeTemplate.python.replace( "wss://mempool.space/api/v1/ws", "wss://mempool.space/" + this.network + "/api/v1/ws" ) ) : code.codeTemplate.python );
+    return ( ( this.network === 'testnet' || this.network === 'testnet4' || this.network === 'signet' ) ? ( code.codeTemplate.python.replace( "wss://mempool.space/api/v1/ws", "wss://mempool.space/" + this.network + "/api/v1/ws" ) ) : code.codeTemplate.python );
   }
 
   replaceJSPlaceholder(text: string, code: any) {
diff --git a/frontend/src/app/services/enterprise.service.ts b/frontend/src/app/services/enterprise.service.ts
index 5de57b059..4ea890f1f 100644
--- a/frontend/src/app/services/enterprise.service.ts
+++ b/frontend/src/app/services/enterprise.service.ts
@@ -41,6 +41,7 @@ export class EnterpriseService {
 
   disableSubnetworks(): void {
     this.stateService.env.TESTNET_ENABLED = false;
+    this.stateService.env.TESTNET4_ENABLED = false;
     this.stateService.env.LIQUID_ENABLED = false;
     this.stateService.env.LIQUID_TESTNET_ENABLED = false;
     this.stateService.env.SIGNET_ENABLED = false;
diff --git a/frontend/src/app/services/mining.service.ts b/frontend/src/app/services/mining.service.ts
index 96723921e..952d13a78 100644
--- a/frontend/src/app/services/mining.service.ts
+++ b/frontend/src/app/services/mining.service.ts
@@ -58,7 +58,7 @@ export class MiningService {
     // I think it's fine to hardcode this since we don't have x1000 hashrate jump everyday
     // If we want to support the mining dashboard for testnet, we can hardcode it too
     let selectedPower = 18;
-    if (this.stateService.network === 'testnet') {
+    if (this.stateService.network === 'testnet' || this.stateService.network === 'testnet4') {
       selectedPower = 12;
     }
 
diff --git a/frontend/src/app/services/navigation.service.ts b/frontend/src/app/services/navigation.service.ts
index 2db3f6025..1a22c1371 100644
--- a/frontend/src/app/services/navigation.service.ts
+++ b/frontend/src/app/services/navigation.service.ts
@@ -9,6 +9,7 @@ const networkModules = {
     subnets: [
       { name: 'mainnet', path: '' },
       { name: 'testnet', path: '/testnet' },
+      { name: 'testnet4', path: '/testnet4' },
       { name: 'signet', path: '/signet' },
     ],
   },
@@ -68,7 +69,7 @@ export class NavigationService {
       }
       if (route.url?.length) {
         path = [path, ...route.url.map(segment => segment.path).filter(path => {
-          return path.length && !['testnet', 'signet'].includes(path);
+          return path.length && !['testnet', 'testnet4', 'signet'].includes(path);
         })].join('/');
       }
       route = route.firstChild;
diff --git a/frontend/src/app/services/seo.service.ts b/frontend/src/app/services/seo.service.ts
index 008cdc9bc..1431a52d8 100644
--- a/frontend/src/app/services/seo.service.ts
+++ b/frontend/src/app/services/seo.service.ts
@@ -81,7 +81,9 @@ export class SeoService {
 
   getTitle(): string {
     if (this.network === 'testnet')
-      return this.baseTitle + ' - Bitcoin Testnet';
+      return this.baseTitle + ' - Bitcoin Testnet3';
+    if (this.network === 'testnet4')
+      return this.baseTitle + ' - Bitcoin Testnet4';
     if (this.network === 'signet')
       return this.baseTitle + ' - Bitcoin Signet';
     if (this.network === 'liquid')
@@ -92,7 +94,7 @@ export class SeoService {
   }
 
   getDescription(): string {
-    if ( (this.network === 'testnet') || (this.network === 'signet') || (this.network === '') || (this.network == 'mainnet') )
+    if ( (this.network === 'testnet') || (this.network === 'testnet4') || (this.network === 'signet') || (this.network === '') || (this.network == 'mainnet') )
       return this.baseDescription + ' See the real-time status of your transactions, browse network stats, and more.';
     if ( (this.network === 'liquid') || (this.network === 'liquidtestnet') )
       return this.baseDescription + ' See Liquid transactions & assets, get network info, and more.';
diff --git a/frontend/src/app/services/state.service.ts b/frontend/src/app/services/state.service.ts
index 34197a3d1..36fdf0b03 100644
--- a/frontend/src/app/services/state.service.ts
+++ b/frontend/src/app/services/state.service.ts
@@ -40,6 +40,7 @@ export interface Customization {
 
 export interface Env {
   TESTNET_ENABLED: boolean;
+  TESTNET4_ENABLED: boolean;
   SIGNET_ENABLED: boolean;
   LIQUID_ENABLED: boolean;
   LIQUID_TESTNET_ENABLED: boolean;
@@ -73,6 +74,7 @@ export interface Env {
 
 const defaultEnv: Env = {
   'TESTNET_ENABLED': false,
+  'TESTNET4_ENABLED': false,
   'SIGNET_ENABLED': false,
   'LIQUID_ENABLED': false,
   'LIQUID_TESTNET_ENABLED': false,
@@ -318,7 +320,7 @@ export class StateService {
     // (?:preview\/)?                               optional "preview" prefix (non-capturing)
     // (testnet|signet)/                            network string (captured as networkMatches[1])
     // ($|\/)                                       network string must end or end with a slash
-    const networkMatches = url.match(/^\/(?:[a-z]{2}(?:-[A-Z]{2})?\/)?(?:preview\/)?(testnet|signet)($|\/)/);
+    const networkMatches = url.match(/^\/(?:[a-z]{2}(?:-[A-Z]{2})?\/)?(?:preview\/)?(testnet4?|signet)($|\/)/);
     switch (networkMatches && networkMatches[1]) {
       case 'signet':
         if (this.network !== 'signet') {
@@ -337,6 +339,12 @@ export class StateService {
           }
         }
         return;
+      case 'testnet4':
+        if (this.network !== 'testnet4') {
+          this.network = 'testnet4';
+          this.networkChanged$.next('testnet4');
+        }
+        return;
       default:
         if (this.env.BASE_MODULE !== 'mempool') {
           if (this.network !== this.env.BASE_MODULE) {
@@ -385,7 +393,7 @@ export class StateService {
   }
 
   isAnyTestnet(): boolean {
-    return ['testnet', 'signet', 'liquidtestnet'].includes(this.network);
+    return ['testnet', 'testnet4', 'signet', 'liquidtestnet'].includes(this.network);
   }
 
   resetChainTip() {
diff --git a/frontend/src/app/shared/common.utils.ts b/frontend/src/app/shared/common.utils.ts
index be1e32c73..28e510e14 100644
--- a/frontend/src/app/shared/common.utils.ts
+++ b/frontend/src/app/shared/common.utils.ts
@@ -151,7 +151,7 @@ export function nextRoundNumber(num: number): number {
 export function seoDescriptionNetwork(network: string): string {
   if( network === 'liquidtestnet' || network === 'testnet' ) {
     return ' Testnet';
-  } else if( network === 'signet' || network === 'testnet' ) {
+  } else if( network === 'signet' || network === 'testnet' || network === 'testnet4') {
     return ' ' + network.charAt(0).toUpperCase() + network.slice(1);
   }
   return '';
diff --git a/frontend/src/app/shared/components/btc/btc.component.html b/frontend/src/app/shared/components/btc/btc.component.html
index c13a8ff31..e002489f5 100644
--- a/frontend/src/app/shared/components/btc/btc.component.html
+++ b/frontend/src/app/shared/components/btc/btc.component.html
@@ -4,5 +4,6 @@
   <ng-template [ngIf]="network === 'liquid'">L-</ng-template>
   <ng-template [ngIf]="network === 'liquidtestnet'">tL-</ng-template>
   <ng-template [ngIf]="network === 'testnet'">t-</ng-template>
+  <ng-template [ngIf]="network === 'testnet4'">t-</ng-template>
   <ng-template [ngIf]="network === 'signet'">s-</ng-template>{{ unit }}
 </span>
\ No newline at end of file
diff --git a/frontend/src/app/shared/components/global-footer/global-footer.component.html b/frontend/src/app/shared/components/global-footer/global-footer.component.html
index b1ce52e5e..5b0fd77b9 100644
--- a/frontend/src/app/shared/components/global-footer/global-footer.component.html
+++ b/frontend/src/app/shared/components/global-footer/global-footer.component.html
@@ -46,7 +46,7 @@
         <div class="links">
           <p class="category" i18n="footer.explore">Explore</p>
           <p><a *ngIf="env.MINING_DASHBOARD" [routerLink]="['/mining' | relativeUrl]" i18n="mining.mining-dashboard">Mining Dashboard</a></p>
-          <p><a *ngIf="env.LIGHTNING" [routerLink]="['/lightning' | relativeUrl]" i18n="master-page.lightning">Lightning Explorer</a></p>
+          <p><a *ngIf="env.LIGHTNING && lightningNetworks.includes(stateService.network)" [routerLink]="['/lightning' | relativeUrl]" i18n="master-page.lightning">Lightning Explorer</a></p>
           <p><a [routerLink]="['/blocks' | relativeUrl]" i18n="dashboard.recent-blocks">Recent Blocks</a></p>
           <p><a [routerLink]="['/tx/push' | relativeUrl]" i18n="shared.broadcast-transaction|Broadcast Transaction">Broadcast Transaction</a></p>
           <p><a [routerLink]="['/tx/test' | relativeUrl]" i18n="shared.test-transaction|Test Transaction">Test Transaction</a></p>
@@ -62,10 +62,11 @@
           <p><a [routerLink]="['/docs/faq' | relativeUrl]" i18n="faq.more-faq">More FAQs &raquo;</a></p>
         </div>
 
-        <div class="links" *ngIf="officialMempoolSpace || env.TESTNET_ENABLED || env.SIGNET_ENABLED || env.LIQUID_ENABLED || env.LIQUID_TESTNET_ENABLED else toolBox" >
+        <div class="links" *ngIf="officialMempoolSpace || env.TESTNET_ENABLED || env.TESTNET4_ENABLED || env.SIGNET_ENABLED || env.LIQUID_ENABLED || env.LIQUID_TESTNET_ENABLED else toolBox" >
           <p class="category" i18n="footer.networks">Networks</p>
           <p *ngIf="(officialMempoolSpace || (env.BASE_MODULE === 'mempool')) && (currentNetwork !== '') && (currentNetwork !== 'mainnet')"><a [href]="networkLink('mainnet')" i18n="footer.mainnet-explorer">Mainnet Explorer</a></p>
-          <p *ngIf="(officialMempoolSpace || (env.BASE_MODULE === 'mempool')) && (currentNetwork !== 'testnet') && env.TESTNET_ENABLED"><a [href]="networkLink('testnet')" i18n="footer.testnet-explorer">Testnet Explorer</a></p>
+          <p *ngIf="(officialMempoolSpace || (env.BASE_MODULE === 'mempool')) && (currentNetwork !== 'testnet') && env.TESTNET_ENABLED"><a [href]="networkLink('testnet')" i18n="footer.testnet3-explorer">Testnet3 Explorer</a></p>
+          <p *ngIf="(officialMempoolSpace || (env.BASE_MODULE === 'mempool')) && (currentNetwork !== 'testnet4') && env.TESTNET4_ENABLED"><a [href]="networkLink('testnet4')" i18n="footer.testnet4-explorer">Testnet4 Explorer</a> <span class="badge badge-pill badge-warning beta-network" i18n="beta">beta</span></p>
           <p *ngIf="(officialMempoolSpace || (env.BASE_MODULE === 'mempool')) && (currentNetwork !== 'signet') && env.SIGNET_ENABLED"><a [href]="networkLink('signet')" i18n="footer.signet-explorer">Signet Explorer</a></p>
           <p *ngIf="(officialMempoolSpace || env.LIQUID_ENABLED) && (currentNetwork !== 'liquidtestnet')"><a [href]="networkLink('liquidtestnet')" i18n="footer.liquid-testnet-explorer">Liquid Testnet Explorer</a></p>
           <p *ngIf="(officialMempoolSpace || env.LIQUID_ENABLED) && (currentNetwork !== 'liquid')"><a [href]="networkLink('liquid')" i18n="footer.liquid-explorer">Liquid Explorer</a></p>
diff --git a/frontend/src/app/shared/components/global-footer/global-footer.component.scss b/frontend/src/app/shared/components/global-footer/global-footer.component.scss
index 880ab79b4..e0daf4f4c 100644
--- a/frontend/src/app/shared/components/global-footer/global-footer.component.scss
+++ b/frontend/src/app/shared/components/global-footer/global-footer.component.scss
@@ -329,3 +329,8 @@ footer .nowrap {
     margin-right: 10px;
   }
 }
+
+.beta-network {
+  font-size: 8px;
+  margin-left: 1em;
+}
diff --git a/frontend/src/app/shared/components/global-footer/global-footer.component.ts b/frontend/src/app/shared/components/global-footer/global-footer.component.ts
index 5300ba107..a0ab07401 100644
--- a/frontend/src/app/shared/components/global-footer/global-footer.component.ts
+++ b/frontend/src/app/shared/components/global-footer/global-footer.component.ts
@@ -27,6 +27,7 @@ export class GlobalFooterComponent implements OnInit {
   network$: Observable<string>;
   networkPaths: { [network: string]: string };
   currentNetwork = '';
+  lightningNetworks = ['', 'mainnet', 'bitcoin', 'testnet', 'signet'];
   loggedIn = false;
   urlSubscription: Subscription;
   isServicesPage = false;
@@ -76,7 +77,7 @@ export class GlobalFooterComponent implements OnInit {
 
   networkLink(network) {
     const thisNetwork = network || 'mainnet';
-    if( network === '' || network === 'mainnet' || network === 'testnet' || network === 'signet' ) {
+    if( network === '' || network === 'mainnet' || network === 'testnet' || network === 'testnet4' || network === 'signet' ) {
       return (this.env.BASE_MODULE === 'mempool' ? '' : this.env.MEMPOOL_WEBSITE_URL + this.urlLanguage) + this.networkPaths[thisNetwork] || '/';
     }
     if( network === 'liquid' || network === 'liquidtestnet' ) {
diff --git a/frontend/src/app/shared/components/sats/sats.component.html b/frontend/src/app/shared/components/sats/sats.component.html
index 1b4ab9143..bdd718e9f 100644
--- a/frontend/src/app/shared/components/sats/sats.component.html
+++ b/frontend/src/app/shared/components/sats/sats.component.html
@@ -4,5 +4,6 @@
   <ng-template [ngIf]="network === 'liquid'">L-</ng-template>
   <ng-template [ngIf]="network === 'liquidtestnet'">tL-</ng-template>
   <ng-template [ngIf]="network === 'testnet'">t-</ng-template>
+  <ng-template [ngIf]="network === 'testnet4'">t-</ng-template>
   <ng-template [ngIf]="network === 'signet'">s-</ng-template>sats
 </span>
\ No newline at end of file
diff --git a/frontend/src/app/shared/regex.utils.ts b/frontend/src/app/shared/regex.utils.ts
index 422d538e0..187111a59 100644
--- a/frontend/src/app/shared/regex.utils.ts
+++ b/frontend/src/app/shared/regex.utils.ts
@@ -62,6 +62,20 @@ const ADDRESS_CHARS: {
         + `{20,100}`
       + `)`,
   },
+  testnet4: {
+    base58: `[mn2]` // Starts with a single m, n, or 2 (P2PKH is m or n, 2 is P2SH)
+      + BASE58_CHARS
+      + `{33,34}`, // m|n is 34 length, 2 is 35 length (We match the first letter separately)
+    bech32: `(?:`
+        + `tb1` // Starts with tb1
+        + BECH32_CHARS_LW
+        + `{20,100}` // As per bech32, 6 char checksum is minimum
+      + `|`
+        + `TB1` // All upper case version
+        + BECH32_CHARS_UP
+        + `{20,100}`
+      + `)`,
+  },
   signet: {
     base58: `[mn2]`
       + BASE58_CHARS
@@ -128,7 +142,7 @@ const ADDRESS_CHARS: {
 type RegexTypeNoAddrNoBlockHash = | `transaction` | `blockheight` | `date` | `timestamp`;
 export type RegexType = `address` | `blockhash` | RegexTypeNoAddrNoBlockHash;
 
-export const NETWORKS = [`testnet`, `signet`, `liquid`, `liquidtestnet`, `mainnet`] as const;
+export const NETWORKS = [`testnet`, `testnet4`, `signet`, `liquid`, `liquidtestnet`, `mainnet`] as const;
 export type Network = typeof NETWORKS[number]; // Turn const array into union type
 
 export const ADDRESS_REGEXES: [RegExp, Network][] = NETWORKS
@@ -144,6 +158,8 @@ function isNetworkAvailable(network: Network, env: Env): boolean {
   switch (network) {
     case 'testnet':
       return env.TESTNET_ENABLED === true;
+    case 'testnet4':
+      return env.TESTNET4_ENABLED === true;
     case 'signet':
       return env.SIGNET_ENABLED === true;
     case 'liquid':
@@ -160,7 +176,7 @@ function isNetworkAvailable(network: Network, env: Env): boolean {
 export function needBaseModuleChange(fromBaseModule: 'mempool' | 'liquid', toNetwork: Network): boolean {
   if (!toNetwork) return false; // No target network means no change needed
   if (fromBaseModule === 'mempool') {
-    return toNetwork !== 'mainnet' && toNetwork !== 'testnet' && toNetwork !== 'signet';
+    return toNetwork !== 'mainnet' && toNetwork !== 'testnet' && toNetwork !== 'testnet4' && toNetwork !== 'signet';
   }
   if (fromBaseModule === 'liquid') {
     return toNetwork !== 'liquid' && toNetwork !== 'liquidtestnet';
@@ -175,7 +191,7 @@ export function getTargetUrl(toNetwork: Network, address: string, env: Env): str
     targetUrl += '/address/';
     targetUrl += address;
   }
-  if (toNetwork === 'mainnet' || toNetwork === 'testnet' || toNetwork === 'signet') {
+  if (toNetwork === 'mainnet' || toNetwork === 'testnet' || toNetwork === 'testnet4' || toNetwork === 'signet') {
     targetUrl = env.MEMPOOL_WEBSITE_URL;
     targetUrl += (toNetwork === 'mainnet' ? '' : `/${toNetwork}`);
     targetUrl += '/address/';
@@ -209,6 +225,9 @@ export function getRegex(type: RegexType, network?: Network): RegExp {
         case `testnet`:
           leadingZeroes = 8; // Assumes at least 32 bits of difficulty
           break;
+        case `testnet4`:
+          leadingZeroes = 8; // Assumes at least 32 bits of difficulty
+          break;
         case `signet`:
           leadingZeroes = 5;
           break;
@@ -261,6 +280,15 @@ export function getRegex(type: RegexType, network?: Network): RegExp {
           regex += `|`; // OR
           regex += `(?:02|03)${HEX_CHARS}{64}`; // Compressed pubkey
           break;
+        case `testnet4`:
+          regex += ADDRESS_CHARS.testnet.base58;
+          regex += `|`; // OR
+          regex += ADDRESS_CHARS.testnet.bech32;
+          regex += `|`; // OR
+          regex += `04${HEX_CHARS}{128}`; // Uncompressed pubkey
+          regex += `|`; // OR
+          regex += `(?:02|03)${HEX_CHARS}{64}`; // Compressed pubkey
+          break;
         case `signet`:
           regex += ADDRESS_CHARS.signet.base58;
           regex += `|`; // OR
diff --git a/production/bitcoin.conf b/production/bitcoin.conf
index 3ec72e2e2..26d61b18c 100644
--- a/production/bitcoin.conf
+++ b/production/bitcoin.conf
@@ -84,6 +84,39 @@ zmqpubrawtx=tcp://127.0.0.1:18335
 #addnode=[2401:b140:4::92:205]:18333
 #addnode=[2401:b140:4::92:206]:18333
 
+[testnet4]
+daemon=1
+rpcbind=127.0.0.1:48332
+rpcbind=[::1]:48332
+bind=0.0.0.0:48333
+bind=[::]:48333
+zmqpubrawblock=tcp://127.0.0.1:48334
+zmqpubrawtx=tcp://127.0.0.1:48335
+#addnode=[2401:b140:1::92:201]:48333
+#addnode=[2401:b140:1::92:202]:48333
+#addnode=[2401:b140:1::92:203]:48333
+#addnode=[2401:b140:1::92:204]:48333
+#addnode=[2401:b140:1::92:205]:48333
+#addnode=[2401:b140:1::92:206]:48333
+#addnode=[2401:b140:2::92:201]:48333
+#addnode=[2401:b140:2::92:202]:48333
+#addnode=[2401:b140:2::92:203]:48333
+#addnode=[2401:b140:2::92:204]:48333
+#addnode=[2401:b140:2::92:205]:48333
+#addnode=[2401:b140:2::92:206]:48333
+#addnode=[2401:b140:3::92:201]:48333
+#addnode=[2401:b140:3::92:202]:48333
+#addnode=[2401:b140:3::92:203]:48333
+#addnode=[2401:b140:3::92:204]:48333
+#addnode=[2401:b140:3::92:205]:48333
+#addnode=[2401:b140:3::92:206]:48333
+#addnode=[2401:b140:4::92:201]:48333
+#addnode=[2401:b140:4::92:202]:48333
+#addnode=[2401:b140:4::92:203]:48333
+#addnode=[2401:b140:4::92:204]:48333
+#addnode=[2401:b140:4::92:205]:48333
+#addnode=[2401:b140:4::92:206]:48333
+
 [signet]
 daemon=1
 rpcbind=127.0.0.1:38332
diff --git a/production/mempool-build-all b/production/mempool-build-all
index 63dadaac0..1466de3ab 100755
--- a/production/mempool-build-all
+++ b/production/mempool-build-all
@@ -96,6 +96,8 @@ build_backend()
         -e "s!__MEMPOOL_MAINNET_PASS__!${MEMPOOL_MAINNET_PASS}!" \
         -e "s!__MEMPOOL_TESTNET_USER__!${MEMPOOL_TESTNET_USER}!" \
         -e "s!__MEMPOOL_TESTNET_PASS__!${MEMPOOL_TESTNET_PASS}!" \
+        -e "s!__MEMPOOL_TESTNET4_USER__!${MEMPOOL_TESTNET4_USER}!" \
+        -e "s!__MEMPOOL_TESTNET4_PASS__!${MEMPOOL_TESTNET4_PASS}!" \
         -e "s!__MEMPOOL_SIGNET_USER__!${MEMPOOL_SIGNET_USER}!" \
         -e "s!__MEMPOOL_SIGNET_PASS__!${MEMPOOL_SIGNET_PASS}!" \
         -e "s!__MEMPOOL_MAINNET_LIGHTNING_USER__!${MEMPOOL_MAINNET_LIGHTNING_USER}!" \
@@ -130,7 +132,7 @@ source "${NVM_DIR}/nvm.sh"
 
 # what to look for
 frontends=(mainnet liquid onbtc)
-backends=(mainnet testnet signet liquid liquidtestnet onbtc)
+backends=(mainnet testnet testnet4 signet liquid liquidtestnet onbtc)
 frontend_repos=()
 backend_repos=()
 
diff --git a/production/mempool-config.testnet4.json b/production/mempool-config.testnet4.json
new file mode 100644
index 000000000..64336866d
--- /dev/null
+++ b/production/mempool-config.testnet4.json
@@ -0,0 +1,84 @@
+{
+  "MEMPOOL": {
+    "OFFICIAL": true,
+    "NETWORK": "testnet",
+    "BACKEND": "esplora",
+    "HTTP_PORT": 8990,
+    "MINED_BLOCKS_CACHE": 144,
+    "SPAWN_CLUSTER_PROCS": 0,
+    "API_URL_PREFIX": "/api/v1/",
+    "INDEXING_BLOCKS_AMOUNT": -1,
+    "AUDIT": true,
+    "RUST_GBT": true,
+    "POLL_RATE_MS": 1000,
+    "DISK_CACHE_BLOCK_INTERVAL": 1,
+    "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
+    "ALLOW_UNREACHABLE": true,
+    "MAX_TRACKED_ADDRESSES": 10
+  },
+  "SYSLOG" : {
+    "MIN_PRIORITY": "debug"
+  },
+  "CORE_RPC": {
+    "PORT": 48332,
+    "USERNAME": "__BITCOIN_RPC_USER__",
+    "PASSWORD": "__BITCOIN_RPC_PASS__"
+  },
+  "ESPLORA": {
+    "UNIX_SOCKET_PATH": "/bitcoin/socket/esplora-bitcoin-testnet4",
+    "FALLBACK": [
+      "http://node201.fmt.mempool.space:3005",
+      "http://node202.fmt.mempool.space:3005",
+      "http://node203.fmt.mempool.space:3005",
+      "http://node204.fmt.mempool.space:3005",
+      "http://node205.fmt.mempool.space:3005",
+      "http://node206.fmt.mempool.space:3005",
+      "http://node201.va1.mempool.space:3005",
+      "http://node202.va1.mempool.space:3005",
+      "http://node203.va1.mempool.space:3005",
+      "http://node204.va1.mempool.space:3005",
+      "http://node205.va1.mempool.space:3005",
+      "http://node206.va1.mempool.space:3005",
+      "http://node207.va1.mempool.space:3005",
+      "http://node208.va1.mempool.space:3005",
+      "http://node209.va1.mempool.space:3005",
+      "http://node210.va1.mempool.space:3005",
+      "http://node211.va1.mempool.space:3005",
+      "http://node212.va1.mempool.space:3005",
+      "http://node213.va1.mempool.space:3005",
+      "http://node214.va1.mempool.space:3005",
+      "http://node201.fra.mempool.space:3005",
+      "http://node202.fra.mempool.space:3005",
+      "http://node203.fra.mempool.space:3005",
+      "http://node204.fra.mempool.space:3005",
+      "http://node205.fra.mempool.space:3005",
+      "http://node206.fra.mempool.space:3005",
+      "http://node207.fra.mempool.space:3005",
+      "http://node208.fra.mempool.space:3005",
+      "http://node209.fra.mempool.space:3005",
+      "http://node210.fra.mempool.space:3005",
+      "http://node211.fra.mempool.space:3005",
+      "http://node212.fra.mempool.space:3005",
+      "http://node213.fra.mempool.space:3005",
+      "http://node214.fra.mempool.space:3005",
+      "http://node201.tk7.mempool.space:3005",
+      "http://node202.tk7.mempool.space:3005",
+      "http://node203.tk7.mempool.space:3005",
+      "http://node204.tk7.mempool.space:3005",
+      "http://node205.tk7.mempool.space:3005",
+      "http://node206.tk7.mempool.space:3005"
+    ]
+  },
+  "DATABASE": {
+    "ENABLED": true,
+    "HOST": "127.0.0.1",
+    "SOCKET": "/var/run/mysql/mysql.sock",
+    "USERNAME": "__MEMPOOL_TESTNET4_USER__",
+    "PASSWORD": "__MEMPOOL_TESTNET4_PASS__",
+    "DATABASE": "mempool_testnet4"
+  },
+  "STATISTICS": {
+    "ENABLED": true,
+    "TX_PER_SECOND_SAMPLE_PERIOD": 150
+  }
+}
diff --git a/production/mempool-start-all b/production/mempool-start-all
index ff962f95e..c08f1ec07 100755
--- a/production/mempool-start-all
+++ b/production/mempool-start-all
@@ -4,7 +4,7 @@ source "$NVM_DIR/nvm.sh"
 nvm use v20.12.0
 
 # start all mempool backends that exist
-for site in mainnet mainnet-lightning testnet testnet-lightning signet signet-lightning liquid liquidtestnet;do
+for site in mainnet mainnet-lightning testnet testnet-lightning testnet4 signet signet-lightning liquid liquidtestnet;do
     cd "${HOME}/${site}/backend/" && \
     echo "starting mempool backend: ${site}" && \
     screen -dmS "${site}" sh -c 'while true;do npm run start-production;sleep 1;done'
diff --git a/production/nginx/location-testnet4-api.conf b/production/nginx/location-testnet4-api.conf
new file mode 100644
index 000000000..c0569ecf2
--- /dev/null
+++ b/production/nginx/location-testnet4-api.conf
@@ -0,0 +1,162 @@
+###########
+# mempool #
+###########
+
+# Block the internal APIs of esplora
+location /testnet4/api/internal/ {
+	return 404;
+}
+location /testnet4/api/v1/internal/ {
+	return 404;
+}
+
+# websocket has special HTTP headers
+location /testnet4/api/v1/ws {
+	rewrite ^/testnet4/(.*) /$1 break;
+	try_files /dev/null @mempool-testnet4-api-v1-websocket;
+}
+
+# warm cache mining and mempool API responses
+location /testnet4/api/v1/statistics {
+	rewrite ^/testnet4/(.*) /$1 break;
+	try_files /dev/null @mempool-testnet4-api-v1-cache-warm;
+}
+location /testnet4/api/v1/mining {
+	rewrite ^/testnet4/(.*) /$1 break;
+	try_files /dev/null @mempool-testnet4-api-v1-cache-warm;
+}
+
+# it's ok to cache blockchain data "forever", so we do 30d
+location /testnet4/api/v1/block/ {
+	rewrite ^/testnet4/(.*) /$1 break;
+	try_files /dev/null @mempool-testnet4-api-v1-cache-forever;
+}
+
+# everything else gets "normal" cache
+location /testnet4/api/v1 {
+	rewrite ^/testnet4/(.*) /$1 break;
+	try_files /dev/null @mempool-testnet4-api-v1-cache-normal;
+}
+
+###########
+# esplora #
+###########
+
+# it's ok to cache blockchain data "forever", so we do 30d
+location /testnet4/api/block/ {
+	rewrite ^/testnet4/api/(.*) /$1 break;
+	try_files /dev/null @esplora-testnet4-api-cache-forever;
+}
+# other API responses cannot be cached
+location /testnet4/api/ {
+	rewrite ^/testnet4/api/(.*) /$1 break;
+	try_files /dev/null @esplora-testnet4-api-cache-disabled;
+}
+
+###########
+# routing #
+###########
+
+location @mempool-testnet4-api-v1-websocket {
+	proxy_pass $mempoolTestnet4;
+	proxy_http_version 1.1;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header Upgrade $http_upgrade;
+	proxy_set_header Connection "upgrade";
+	proxy_set_header X-Forwarded-Proto $scheme;
+}
+
+location @mempool-testnet4-api-v1-cache-forever {
+	proxy_pass $mempoolTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_cache_background_update on;
+	proxy_cache_use_stale updating;
+	proxy_cache apicold;
+	proxy_cache_valid 200 30d;
+	proxy_redirect off;
+
+	expires 30d;
+}
+
+location @mempool-testnet4-api-v1-cache-warm {
+	proxy_pass $mempoolTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_cache_background_update on;
+	proxy_cache_use_stale updating;
+	proxy_cache apiwarm;
+	proxy_cache_valid 200 10s;
+	proxy_redirect off;
+}
+
+location @mempool-testnet4-api-v1-cache-normal {
+	proxy_pass $mempoolTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_cache apinormal;
+	proxy_cache_valid 200 10s;
+	proxy_redirect off;
+
+	expires 10s;
+}
+
+location @mempool-testnet4-api-v1-cache-disabled {
+	proxy_pass $mempoolTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_redirect off;
+	proxy_buffering off;
+
+	expires -1;
+}
+
+location @esplora-testnet4-api-cache-disabled {
+	proxy_pass $esploraTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_redirect off;
+	proxy_buffering off;
+
+	expires -1;
+}
+
+location @esplora-testnet4-api-cache-forever {
+	proxy_pass $esploraTestnet4;
+
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+	proxy_set_header X-Forwarded-Proto $scheme;
+
+	proxy_cache_background_update on;
+	proxy_cache_use_stale updating;
+	proxy_cache apicold;
+	proxy_cache_valid 200 30d;
+	proxy_redirect off;
+
+	expires 30d;
+}
diff --git a/production/nginx/nginx.conf b/production/nginx/nginx.conf
index c48d4992a..169faab30 100644
--- a/production/nginx/nginx.conf
+++ b/production/nginx/nginx.conf
@@ -55,12 +55,14 @@ http {
 		set $mempoolMainnetLightning "http://mempool-bitcoin-mainnet-lightning";
 		set $mempoolTestnet "http://mempool-bitcoin-testnet";
 		set $mempoolTestnetLightning "http://mempool-bitcoin-testnet-lightning";
+		set $mempoolTestnet4 "http://mempool-bitcoin-testnet4";
 		set $mempoolSignet "http://mempool-bitcoin-signet";
 		set $mempoolSignetLightning "http://mempool-bitcoin-signet-lightning";
 
 		# for blockstream/esplora daemons, see upstream-esplora.conf
 		set $esploraMainnet "http://esplora-bitcoin-mainnet";
 		set $esploraTestnet "http://esplora-bitcoin-testnet";
+		set $esploraTestnet4 "http://esplora-bitcoin-testnet4";
 		set $esploraSignet "http://esplora-bitcoin-signet";
 
 		# filesystem paths
diff --git a/production/nginx/server-mempool.conf b/production/nginx/server-mempool.conf
index 892fe50e1..a63c27fca 100644
--- a/production/nginx/server-mempool.conf
+++ b/production/nginx/server-mempool.conf
@@ -5,5 +5,7 @@ include mempool/production/nginx/location-api-v1-lightning.conf;
 include mempool/production/nginx/location-api.conf;
 include mempool/production/nginx/location-testnet-api.conf;
 include mempool/production/nginx/location-testnet-api-v1-lightning.conf;
+include mempool/production/nginx/location-testnet4-api.conf;
+#include mempool/production/nginx/location-testnet4-api-v1-lightning.conf;
 include mempool/production/nginx/location-signet-api.conf;
 include mempool/production/nginx/location-signet-api-v1-lightning.conf;
diff --git a/production/nginx/upstream-esplora.conf b/production/nginx/upstream-esplora.conf
index b7fbbf163..88ffa11bd 100644
--- a/production/nginx/upstream-esplora.conf
+++ b/production/nginx/upstream-esplora.conf
@@ -7,6 +7,9 @@ upstream esplora-liquid-mainnet {
 upstream esplora-bitcoin-testnet {
 	server unix:/bitcoin/socket/esplora-bitcoin-testnet fail_timeout=10s max_fails=10 weight=99999;
 }
+upstream esplora-bitcoin-testnet4 {
+	server unix:/bitcoin/socket/esplora-bitcoin-testnet4 fail_timeout=10s max_fails=10 weight=99999;
+}
 upstream esplora-bitcoin-signet {
 	server unix:/bitcoin/socket/esplora-bitcoin-signet fail_timeout=10s max_fails=10 weight=99999;
 }
diff --git a/production/nginx/upstream-mempool.conf b/production/nginx/upstream-mempool.conf
index c9cf9c2bb..50d291910 100644
--- a/production/nginx/upstream-mempool.conf
+++ b/production/nginx/upstream-mempool.conf
@@ -7,9 +7,6 @@ upstream mempool-liquid-mainnet {
 upstream mempool-bitcoin-testnet {
 	server 127.0.0.1:8997 fail_timeout=10s max_fails=10 weight=99999;
 }
-upstream mempool-bitcoin-bisq {
-	server 127.0.0.1:8996 fail_timeout=10s max_fails=10 weight=99999;
-}
 upstream mempool-bitcoin-signet {
 	server 127.0.0.1:8995 fail_timeout=10s max_fails=10 weight=99999;
 }
@@ -25,3 +22,6 @@ upstream mempool-bitcoin-testnet-lightning {
 upstream mempool-bitcoin-signet-lightning {
 	server 127.0.0.1:8991 fail_timeout=10s max_fails=10 weight=99999;
 }
+upstream mempool-bitcoin-testnet4 {
+	server 127.0.0.1:8990 fail_timeout=10s max_fails=10 weight=99999;
+}