Core lookup
Chain ID List: Decimal, Hex, RPC URLs
Find decimal and hex mainnet chain IDs with copy-ready RPC URLs, gas tokens, explorers, source docs, and source snapshots.
Guides
Mainnet guides
Choose the guide by what you are about to copy: a chain ID, public RPC URL, explorer, wallet JSON snippet, or a plain-English mainnet explanation.
Most common tasks
Choose the right lookup
Need a number, URL, or wallet snippet quickly? Open the chain ID list for decimal and hex IDs, the RPC list for public endpoints, or the EIP-3085 guide for wallet_addEthereumChain JSON. For one chain, its status page is the shortest path.
Core lookup
Mainnet RPC List: Chain IDs, URLs, Explorers
Copy public RPC URLs, chain IDs, explorers, source docs, source snapshot provenance, and production safety notes.
Core lookup
wallet_addEthereumChain JSON and nativeCurrency fields
Copy-ready EIP-3085 wallet_addEthereumChain JSON examples with chainId, rpcUrls, blockExplorerUrls, and nativeCurrency fields.
RPC context
Ethereum mainnet RPC: public vs private
Chain ID 1, public Ethereum RPC context, and when a dedicated provider endpoint fits better.
RPC context
Base mainnet RPC comparison
Base chain ID 8453, public Base RPC, and factual notes for Alchemy, QuickNode, and dedicated provider endpoints.
RPC context
MegaETH launch FAQ
MegaETH chain ID 4326, mainnet RPC URL, source links, and launch context without readiness claims.
Wallet setup
Base chain ID 8453, RPC URL, and wallet config
Copy Base mainnet chain ID 8453 / 0x2105, public RPC endpoint, gas token, explorer, Base docs link, and wallet config fields.
Wallet setup
MegaETH chain ID 4326, RPC URL, and explorer
Copy MegaETH mainnet chain ID 4326 / 0x10e6, RPC URL, explorer, ETH gas token, source docs, and setup cautions.
Wallet setup
Polygon chain ID 137, RPC URL, and docs
Copy Polygon PoS chain ID 137 / 0x89, public RPC endpoint, POL gas token, Polygonscan explorer, source docs, and setup cautions.
Wallet setup
Monad chain ID 143, RPC URL, and docs
Copy Monad chain ID 143 / 0x8f, public RPC endpoint, MON gas token, explorer, source docs, and wallet config fields.
Wallet setup
World Chain chain ID 480, RPC URL, and docs
Copy World Chain chain ID 480 / 0x1e0, public RPC endpoint, ETH gas token, Worldscan explorer, source docs, and setup cautions.
Wallet setup
Flow EVM chain ID 747, RPC URL, and docs
Copy Flow EVM chain ID 747 / 0x2eb, public RPC endpoint, FLOW gas token, explorer, source docs, and setup cautions.
Wallet setup
Mode chain ID 34443, RPC URL, and docs
Copy Mode chain ID 34443 / 0x868b, public RPC endpoint, ETH gas token, explorer, source docs, and setup cautions.
Wallet setup
Arbitrum One chain ID 42161, RPC URL, and docs
Copy Arbitrum One chain ID 42161 / 0xa4b1, public RPC endpoint, ETH gas token, Arbiscan explorer, source docs, and setup cautions.
Wallet setup
Avalanche C-Chain chain ID, RPC URL, and copy config
Copy Avalanche C-Chain chain ID 43114, public RPC endpoint, AVAX gas token, Snowscan explorer, source docs, and setup cautions.
Wallet setup
OP Mainnet chain ID 10, RPC URL, and Optimism docs
Copy OP Mainnet / Optimism chain ID 10 / 0xa, public RPC endpoint, ETH gas token, explorer, source docs, and setup cautions.
Wallet setup
ZKsync Era chain ID, RPC URL, and copy config
Copy ZKsync Era chain ID 324, public RPC endpoint, ETH gas token, explorer, source docs, and setup cautions.
Wallet setup
Linea chain ID, RPC URL, and copy config
Copy Linea chain ID 59144, public RPC endpoint, ETH gas token, Lineascan explorer, source docs, and setup cautions.
Wallet setup
Unichain chain ID, RPC URL, and copy config
Copy Unichain chain ID 130, public RPC endpoint, ETH gas token, explorer, source docs, and setup cautions.
Guide
EVM mainnets
Ethereum-compatible mainnets with numeric chain IDs, RPC URLs, explorers, and source links.
Guide
L2 Mainnet RPC List: Chain IDs and URLs
Copy Ethereum L2 RPC URLs, chain IDs, explorers, gas tokens, source snapshots, and setup cautions.
Guide
Block Explorer List: Mainnet URLs and Chain IDs
Open block explorer links for mainnet chains, grouped with chain IDs, RPC URLs, and setup context.
Guide
RPC endpoint vs node provider
Plain-English differences between a raw RPC endpoint URL, a public RPC, and a dedicated node provider.
Guide
Public RPC safety
How to use public RPC endpoints without treating them as reliability, privacy, or security guarantees.
Guide
Add a network to a wallet
Checklist for adding custom EVM networks to wallets without trusting copied settings blindly.
Guide
Wrong network RPC error checklist
Checklist for debugging wrong-network, chain ID mismatch, and RPC URL mismatch errors.
Guide
OP Stack mainnets
OP Stack mainnet chain IDs, public RPC URLs, explorers, gas tokens, and setup notes.
Guide
Mainnet vs testnet
Plain-English differences between production blockchain networks and test environments.