Guide
Chain ID list
When a wallet, RPC client, or support doc asks for a chain ID, copy the decimal value, check the hex form when available, and open the matching status page for RPC, explorer, gas token, and source links.
Quick settings
Copy a mainnet chain ID
MegaETH uses chain ID 4326 / 0x10e6, Polygon PoS uses137 / 0x89, OP Mainnet uses 10 / 0xa, and Avalanche C-Chain uses 43114 / 0xa86a. Use each status page for the matching RPC URL, explorer, gas token, and source links.
Quick chain ID lookups
MegaETHMegaETH chain ID 4326 / 0x10e6RPC https://mainnet.megaeth.com/rpcPolygon PoSPolygon PoS chain ID 137 / 0x89RPC https://polygon.drpc.orgOP MainnetOP Mainnet chain ID 10 / 0xaRPC https://mainnet.optimism.ioAvalanche C-ChainAvalanche C-Chain chain ID 43114 / 0xa86aRPC https://api.avax.network/ext/bc/C/rpc
EVM chains67
Non-EVM rows1
Source snapshotJuly 4, 2026
SourcesLinked
Mainnet chain IDs
Before you add it to a wallet
A matching chain ID does not prove an RPC endpoint is official, safe, private, or reliable. Phishing sites can copy legitimate network values. Use the linked source page for each network when adding a custom wallet network or configuring production infrastructure.
Chain ID questions
- What is a chain ID list?
- A chain ID list maps mainnet networks to decimal and hex chain IDs, RPC URLs, explorers, gas tokens, and source links.
- What is MegaETH chain ID?
- MegaETH mainnet uses chain ID 4326 / 0x10e6, RPC URL https://mainnet.megaeth.com/rpc, and explorer https://mega.etherscan.io.
- Should I verify a chain ID before adding a wallet network?
- Yes. Verify the chain ID, RPC URL, explorer, and gas token against source documentation before adding a custom wallet network.