diff --git a/.changeset/add-arc-mainnet.md b/.changeset/add-arc-mainnet.md
new file mode 100644
index 000000000..60abb8605
--- /dev/null
+++ b/.changeset/add-arc-mainnet.md
@@ -0,0 +1,5 @@
+---
+'@0xsequence/network': patch
+---
+
+Add Arc mainnet (chain 5042)
diff --git a/packages/network/src/config.ts b/packages/network/src/config.ts
index f31a1e580..79e926ea4 100644
--- a/packages/network/src/config.ts
+++ b/packages/network/src/config.ts
@@ -145,6 +145,7 @@ export const allNetworks = validateAndSortNetworks([
   createNetworkConfig(ChainId.INCENTIV, { disabled: true }),
   createNetworkConfig(ChainId.KATANA),
   createNetworkConfig(ChainId.SANDBOX_TESTNET, { disabled: true }),
+  createNetworkConfig(ChainId.ARC),
   createNetworkConfig(ChainId.ARC_TESTNET),
   createNetworkConfig(ChainId.HYPEREVM),
   createNetworkConfig(ChainId.BERACHAIN),
diff --git a/packages/network/src/constants.ts b/packages/network/src/constants.ts
index c840501fb..a3e0829a7 100644
--- a/packages/network/src/constants.ts
+++ b/packages/network/src/constants.ts
@@ -147,6 +147,7 @@ export enum ChainId {
   SANDBOX_TESTNET = 6252,
 
   // ARC
+  ARC = 5042,
   ARC_TESTNET = 5042002,
 
   // HYPEREVM
@@ -1216,6 +1217,24 @@ export const networks: Record<ChainId, NetworkMetadata> = {
     }
   },
 
+  [ChainId.ARC]: {
+    chainId: ChainId.ARC,
+    type: NetworkType.MAINNET,
+    name: 'arc',
+    title: 'Arc',
+    logoURI: `https://assets.sequence.info/images/networks/medium/${ChainId.ARC}.webp`,
+    testnet: false,
+    blockExplorer: {
+      name: 'Arc Explorer',
+      rootUrl: 'https://arc.etherscan.io/'
+    },
+    nativeToken: {
+      symbol: 'USDC',
+      name: 'USDC',
+      decimals: 18
+    }
+  },
+
   [ChainId.ARC_TESTNET]: {
     chainId: ChainId.ARC_TESTNET,
     type: NetworkType.TESTNET,