# Chain IDs

Chain ID helps expand.network to redirect the query or transaction to the appropriate chain.

In the **absence** of chainId and chainSymbol, expand.network will connect to ethereum mainnet.

 Following is the list of chains with their respective chain IDs. 

| Chain Name                | Chain ID    | Chain Symbol |
| ------------------------- | ----------- | ------------ |
| Ethereum                  | 1           | ETH          |
| Ethereum testnet Holesky  | 17000       | TETHHSKY     |
| Ethereum testnet Sepolia  | 11155111    | TETHSPL      |
| Ethereum testnet Hoodi    | 560048      | THOODI       |
| BSC                       | 56          | BSC          |
| BSC Testnet               | 97          | TBSC         |
| Avalanche - C chain       | 43114       | C-AVAX       |
| Avalanche - P chain       | 43115       | P-AVAX       |
| Avalanche - X chain       | 43116       | X-AVAX       |
| Avalanche Testnet         | 43113       | TAVAX        |
| Polygon                   | 137         | MATIC        |
| Polygon Testnet Amoy      | 80002       | AMATIC       |
| Cronos                    | 25          | CRO          |
| Cronos Testnet            | 338         | TCRO         |
| Arbitrum                  | 42161       | AETH         |
| Arbitrum Testnet Goerli   | 421613      | TAETH        |
| Arbitrum Testnet Sepolia  | 421614      | TASPL        |
| Fantom                    | 250         | FTM          |
| Fantom Testnet            | 4002        | TFTM         |
| zkSync Era                | 324         | ZKS          |
| zkSync Era Testnet        | 300         | TZKS         |
| Solana                    | 900         | SOL          |
| Solana Devnet             | 901         | DSOL         |
| Tron                      | 1000        | TRON         |
| Tron Testnet (NILE)       | 1001        | TTRON        |
| TON                       | 1100        | TON          |
| TON Testnet               | 1101        | TTON         |
| Near                      | 1200        | NEAR         |
| Near Testnet              | 1201        | TNEAR        |
| Algorand                  | 1300        | ALGO         |
| Algorand Testnet          | 1301        | TALGO        |
| Optimism                  | 10          | OPT          |
| Optimism Testnet: Sepolia | 11155420    | TSPL         |
| Starknet                  | 400         | STRK         |
| Starknet Testnet          | 401         | TSTRK        |
| Aptos                     | 1400        | APT          |
| Aptos Testnet             | 1401        | TAPT         |
| Sui                       | 101         | SUI          |
| Sui Devnet                | 102         | DSUI         |
| Sui Testnet               | 103         | TSUI         |
| Base                      | 8453        | BASE         |
| Base - Sepolia            | 84532       | TBASE2       |
| Stellar Mainnet           | 1500        | XLM          |
| Stelar Testnet            | 1501        | TXLM         |
| XRP Ledger                | 1600        | XRPL         |
| XRP Ledger Testnet        | 1601        | TXRPL        |
| Cosmoshub Mainnet         | cosmoshub-4 | cosmos       |
| Stacks Mainnet            | 1700        | STX          |
| Stacks Testnet            | 1701        | TSTX         |
| Bitcoin                   | 1800        | BTC          |
| Bitcoin Testnet           | 1801        | TBTC         |
| Osmosis                   | osmosis-1   | osmos        |
| Osmosis Testnet           | osmo-test-5 | tosmos       |
| Mantle                    | 5000        | MNT          |
| Mantle Testnet            | 5003        | TMNT         |
| Botanix                   | 3637        | BOT          |
| BotanixTestnet            | 3636        | TBOT         |
| Kaia                      | 8217        | KAIA         |
| Kaia Testnet              | 1001        | TKAIA        |

### Possible Outcomes based on the following inputs :

| chainId | chainSymbol | Output based on |
| ------- | ----------- | --------------- |
| Yes     | No          | chainId         |
| No      | Yes         | chainSymbol     |
| Yes     | Yes         | chainId         |
| No      | No          | chainId = 1     |