# 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     |


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.expand.network/ids/chain-ids.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.