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Setup MetaMask on Ethereum Layer2 Networks

Web3

I couldn't find websites that comprehensively listed the major Ethereum Layer 2 networks to set up in MetaMask, so I listed them up.

*The value of Network Name is arbitrary.



Arbitrum Mainnet

Network Name --- Arb1
New RPC URL --- https://arb1.arbitrum.io/rpc
Chain ID --- 42161
Currency Symbol --- ETH
Block Explorer URL --- https://arbiscan.io

Reference: https://coinguides.org/arbitrum-metamask-bridge/#arbitrum-metamask



Arbitrum Rinkeby (Testnet)

Network Name --- Arbitrum Rinkeby
New RPC URL --- https://rinkeby.arbitrum.io/rpc
Chain ID --- 421611
Currency Symbol --- ETH
Block Explorer URL --- https://rinkeby-explorer.arbiscan.io



Avalanche Mainnet

Network Name --- Avalanche Mainnet C-Chain
New RPC URL --- https://api.avax.network/ext/bc/C/rpc
Chain ID --- 43114
Currency Symbol --- AVAX
Block Explorer URL --- https://snowtrace.io/

Reference: https://docs.avax.network/build/tutorials/smart-contracts/deploy-a-smart-contract-on-avalanche-using-remix-and-metamask/



Avalanche FUJI (Testnet)

Network Name --- Avalanche FUJI C-Chain
New RPC URL --- https://api.avax-test.network/ext/bc/C/rpc
Chain ID --- 43113
Currency Symbol --- AVAX
Block Explorer URL --- https://testnet.snowtrace.io/

Reference: https://docs.avax.network/build/tutorials/smart-contracts/deploy-a-smart-contract-on-avalanche-using-remix-and-metamask/



BSC Mainnet

Network Name --- BSC Mainnet
New RPC URL --- https://bsc-dataseed.binance.org/
Chain ID --- 56
Currency Symbol --- BNB
Block Explorer URL --- https://bscscan.com

Reference:
https://docs.binance.org/smart-chain/wallet/metamask.html



BSC Testnet

Network Name --- BSC Testnet
New RPC URL --- https://data-seed-prebsc-1-s1.binance.org:8545/
Chain ID --- 97
Currency Symbol --- BNB
Block Explorer URL --- https://testnet.bscscan.com

Reference:
https://docs.binance.org/smart-chain/wallet/metamask.html



Fantom Mainnet

Network Name --- Fantom Mainnet
New RPC URL --- https://rpc.ftm.tools/
Chain ID --- 250
Currency Symbol --- FTM
Block Explorer URL --- https://ftmscan.com/

Reference:
https://docs.fantom.foundation/tutorials/set-up-metamask



Fantom Testnet

Network Name --- Fantom Testnet
New RPC URL --- https://rpc.testnet.fantom.network/
Chain ID --- 4002
Currency Symbol --- FTM
Block Explorer URL --- https://testnet.ftmscan.com/

Reference:
https://docs.fantom.foundation/tutorials/set-up-metamask-testnet



Optimism Mainnet

Network Name --- Optimistic Ethereum
New RPC URL --- https://mainnet.optimism.io/
Chain ID --- 10
Currency Symbol --- ETH
Block Explorer URL --- https://optimistic.etherscan.io/

Reference:
https://metamask.zendesk.com/hc/en-us/articles/4403700785691-Using-Optimistic-Ethereum-with-MetaMask



Optimism Kovan (Testnet)

Network Name --- Optimistic Kovan
New RPC URL --- https://kovan.optimism.io/
Chain ID --- 69
Currency Symbol --- ETH
Block Explorer URL --- https://kovan-optimistic.etherscan.io/



Polygon Mainnet

Network Name --- Polygon Mainnet
New RPC URL --- https://polygon-rpc.com/
Chain ID --- 137
Currency Symbol --- MATIC
Block Explorer URL --- https://polygonscan.com/

Reference:
https://docs.polygon.technology/docs/develop/metamask/config-polygon-on-metamask/



Polygon Mumbai (Testnet)

Network Name --- Polygon Mumbai
New RPC URL --- https://rpc-mumbai.maticvigil.com/
Chain ID --- 80001
Currency Symbol --- MATIC
Block Explorer URL --- https://mumbai.polygonscan.com/

Reference:
https://docs.polygon.technology/docs/develop/metamask/config-polygon-on-metamask/



xDai Mainnet

Network Name --- Gnosis Chain
New RPC URL --- https://rpc.xdaichain.com/
Chain ID --- 100
Currency Symbol --- xDai
Block Explorer URL --- https://blockscout.com/xdai/mainnet/

Reference:
https://www.xdaichain.com/for-users/wallets/metamask/metamask-setup