diff --git a/packages/apps-config/src/settings/ss58.ts b/packages/apps-config/src/settings/ss58.ts
index 748c703..f5b9467 100644
--- a/packages/apps-config/src/settings/ss58.ts
+++ b/packages/apps-config/src/settings/ss58.ts
@@ -6,12 +6,41 @@ import type { Option } from './types.js';
 
 import { selectableNetworks } from '@pezkuwi/networks';
 
-const networks = selectableNetworks
-  .map(({ displayName, network, prefix }) => ({
-    info: network,
-    text: displayName,
-    value: prefix
-  }))
+// Pezkuwi custom networks (not in upstream ss58-registry)
+const pezkuwiNetworks = [
+  {
+    info: 'pezkuwi',
+    text: 'Pezkuwi Relay Chain',
+    value: 0
+  },
+  {
+    info: 'dicle',
+    text: 'Dicle Relay Chain',
+    value: 2
+  },
+  {
+    info: 'zagros',
+    text: 'Zagros Testnet',
+    value: 42
+  },
+  {
+    info: 'pezkuwichain',
+    text: 'PezkuwiChain Development',
+    value: 42
+  }
+];
+
+const networks = [
+  ...pezkuwiNetworks,
+  ...selectableNetworks
+    .map(({ displayName, network, prefix }) => ({
+      info: network,
+      text: displayName,
+      value: prefix
+    }))
+    // Filter out polkadot/kusama since we're replacing them with pezkuwi/dicle
+    .filter(({ info }) => !['polkadot', 'kusama'].includes(info || ''))
+]
   .sort((a, b) =>
     [0, 2, 42].includes(a.value) || [0, 2, 42].includes(b.value)
       ? 0