IBAN Validator

Check that an IBAN is correctly formed before sending a transfer.

IBANValid?CountryDetails

● IBANs are checked in your browser only and never sent anywhere.

How it works

An IBAN starts with a country code and two check digits, followed by the national account number (BBAN). Validation checks the length for the country, then moves the first four characters to the end, replaces letters by numbers (A = 10 … Z = 35) and verifies that the result modulo 97 equals 1 (ISO 13616). A valid IBAN can still belong to a closed account: always double-check the beneficiary's name.