Multi-Chain Contract Presence

Reads an address on every network at once, each through its own public endpoint so no wallet switching is needed, and reports where it holds code. The useful answer is rarely "it exists on six chains" — it is that the code differs on one of them, which means approving that address on one chain tells you nothing about what it does on another. Because contract addresses are deterministic from deployer and nonce, the same address genuinely can hold entirely different contracts across chains, and that is exactly the case worth catching. The appended Solidity metadata blob is stripped before comparison, so one source compiled on two machines still matches rather than looking like two contracts. A dash means no code there; a question mark means the endpoint did not answer, which is a different thing and shown differently.