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Eric Bishard
Eric Bishard

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Ethereum Chains

This document is reference for the networks I use regularly, and is usually up to date. If something doesn't work, you should use ChainList. You can convert chainIds to hex using tools like eserialize to do so.

Example: Convert Polygon Mumbai chainId

Mainnets

Network RPC URL Chain Hex Symb Explorer URL
Mainnet eth.llamarpc.com 1 0x1 ETH etherscan.io
Polygon polygon-rpc.com 137 0x89 MATIC polygonscan.com
Optimism mainnet.optimism.io 10 0xa ETH optimistic.etherscan.io

Testnets

Network RPC URL Chain Hex Symb Explorer URL
Mumbai rpc-mumbai.maticvigil.com 80001 0x13881 MATIC mumbai.polygonscan.com
Goerli goerli.blockpi.network 5 0x5 ETH goerli.etherscan.io

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