Check an IBAN before you use it.
Validate country support, expected length, BBAN structure, and MOD-97 checksum. LookTwice masks the returned IBAN and never claims to verify the underlying account.
Result
Run a real check.
The response will appear here with timestamps, evidence, and honest boundaries.
What this does not prove
A valid structure and checksum do not prove that an account exists, is open, belongs to a person, or can receive a payment.
Built for integration
Use the result in code.
The public tool is intentionally rate limited. A LookTwice workspace adds API keys, idempotency, usage history, higher limits, and the documented production endpoint.