diff --git a/.changeset/great-pens-smash.md b/.changeset/great-pens-smash.md
new file mode 100644
index 0000000000..8eaa4c1470
--- /dev/null
+++ b/.changeset/great-pens-smash.md
@@ -0,0 +1,5 @@
+---
+"viem": patch
+---
+
+Added ENULS Mainnet.
diff --git a/src/chains/definitions/enuls.ts b/src/chains/definitions/enuls.ts
new file mode 100644
index 0000000000..9645f437ed
--- /dev/null
+++ b/src/chains/definitions/enuls.ts
@@ -0,0 +1,21 @@
+import { defineChain } from '../../utils/chain/defineChain.js'
+
+export const enuls = /*#__PURE__*/ defineChain({
+  id: 119,
+  name: 'ENULS Mainnet',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'NULS',
+    symbol: 'NULS',
+  },
+  rpcUrls: {
+    default: { http: ['https://evmapi2.nuls.io'] },
+  },
+  blockExplorers: {
+    default: {
+      name: 'ENULS Explorer',
+      url: 'https://evmscan.nuls.io',
+    },
+  },
+  testnet: false,
+})
diff --git a/src/chains/index.ts b/src/chains/index.ts
index 7291e9e10c..dc43b2efc0 100644
--- a/src/chains/index.ts
+++ b/src/chains/index.ts
@@ -115,6 +115,7 @@ export { elastosTestnet } from './definitions/elastosTestnet.js'
 export { electroneum } from './definitions/electroneum.js'
 export { electroneumTestnet } from './definitions/electroneumTestnet.js'
 export { elysiumTestnet } from './definitions/elysiumTestnet.js'
+export { enuls } from './definitions/enuls.js'
 export { eon } from './definitions/eon.js'
 export { eos } from './definitions/eos.js'
 export { eosTestnet } from './definitions/eosTestnet.js'