diff --git a/docs/core-concepts/network-and-token-support.mdx b/docs/core-concepts/network-and-token-support.mdx
index ffab259f2a..d5896caab3 100644
--- a/docs/core-concepts/network-and-token-support.mdx
+++ b/docs/core-concepts/network-and-token-support.mdx
@@ -23,6 +23,8 @@ x402 V2 uses [CAIP-2](https://chainagnostic.org/CAIPs/caip-2) standard network i
 | `avalanche-fuji` | `eip155:43113` | 43113 | Avalanche Fuji testnet |
 | `polygon` | `eip155:137` | 137 | Polygon mainnet |
 | `polygon-amoy` | `eip155:80002` | 80002 | Polygon Amoy testnet |
+| - | `eip155:42161` | 42161 | Arbitrum One mainnet |
+| - | `eip155:421614` | 421614 | Arbitrum Sepolia testnet |
 | `sei` | `eip155:1329` | 1329 | Sei mainnet |
 | `sei-testnet` | `eip155:713715` | 713715 | Sei testnet |
 | `skale-base` | `eip155:1187947933` | 1187947933 | SKALE mainnet |