# Chain ID

## Definition

A Chain ID is a numeric network identifier used by Ethereum and EVM-compatible networks to distinguish transaction-signing domains and help prevent replay across chains.

## What it means in practice

Ethereum mainnet, Base, Arbitrum and other EVM networks use different Chain IDs even when account addresses have the same 0x format.

## How this concept appears in Terenval Wallet

Terenval's multi-network interface uses network context to separate supported chains, and Chain ID is part of that underlying EVM distinction.

**Important:** Always confirm the selected network instead of relying only on the address format.

**[Install Terenval Wallet](https://wallet.terenval.com/?lang=en)**

## Related terms

- [Multi-chain wallet](https://wallet.terenval.com/glossary/multi-chain-wallet/)
- [Ethereum address](https://wallet.terenval.com/glossary/ethereum-address/)
- [Wrong-network transfer](https://wallet.terenval.com/glossary/wrong-network-transfer/)
- [Ethereum transaction](https://wallet.terenval.com/glossary/ethereum-transaction/)
- [Transaction verification](https://wallet.terenval.com/glossary/transaction-verification/)

## Related Terenval Answers

- [How to Send Crypto Safely Between Wallets](https://wallet.terenval.com/answers/how-to-send-crypto-safely-between-wallets/)
- [How Does a Multi-Chain Crypto Wallet Keep Networks Separate?](https://wallet.terenval.com/answers/how-multi-chain-wallets-keep-networks-separate/)
- [Ethereum Layer 2 Networks and Gas Fees](https://wallet.terenval.com/answers/ethereum-layer-2-networks-and-gas-fees/)

## Sources

- https://developer.bitcoin.org/devguide/
- https://ethereum.org/en/developers/docs/transactions/
- https://wallet.terenval.com/info/security/

Official page: https://wallet.terenval.com/glossary/chain-id/