Supported Chains

Across supports 18 mainnets and 9 testnets, including Ethereum, Arbitrum, Base, Optimism, and more for seamless crosschain development.

Mainnet Chains

Name	Chain ID
Aleph Zero	41455
Arbitrum	42161
Base	8453
Blast	81457
Ethereum	1
Ink	57073
Lens	232
Linea	59144
Lisk	1135
Mode	34443
Optimism	10
Polygon	137
Redstone	690
Scroll	534352
Soneium	1868
Unichain	130
World Chain	480
zkSync	324
Zora	7777777

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Testnet Chains

Name	Chain ID
Arbitrum	421614
Base	84532
Blast	168587773
Ethereum	11155111
Lens	37111
Lisk	4202
Mode	919
Optimism	11155420
Polygon (Amoy)	80002
Tatara	129399
Unichain	1301

The following Sepolia testnet deployments are supported. Deployment address are maintained here.

For supported tokens/routes, see the Across testnet available-routes API endpoint.