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
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
Cosmoshub Testnet	theta-testnet-001	tcosmos
Stacks Mainnet	1700	STX
Stacks Testnet	1701	TSTX

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