Chain basics
What is the Robinhood Chain chain ID?
Robinhood Chain mainnet is chain ID 4663 (0x1237). The testnet is 46630. Both use ETH as the gas token.
Some third-party RPC listings publish 46646 (0xB636) as the testnet chain ID. That is incorrect — Robinhood's own connection documentation says 46630, and a wrong chain ID causes signature replay-protection failures rather than an obvious error.
Robinhood Chain is built on Arbitrum Nitro as an Orbit chain, posting compressed batches to Ethereum using EIP-4844 blobs. Block time is roughly 100 milliseconds.
Source: Robinhood Chain connection docs · checked 2026-08-27