IBAN Validator
Validate IBAN bank account numbers.
How to Use
- Enter an IBAN number (e.g. GB29NWBK60161331926819). Spaces are automatically ignored so you can paste formatted IBANs directly.
- The tool validates the checksum using the MOD-97 algorithm and identifies the country code and bank identifier code (BIC).
- View the validation result: valid/invalid status, country, bank code, and the formatted IBAN.
Frequently Asked Questions
- How does IBAN validation work?
- IBAN validation uses the MOD-97 algorithm: move the first 4 characters to the end, replace each letter with its numeric equivalent (A=10, B=11, …), then check that the resulting number mod 97 equals 1. A valid checksum confirms the IBAN is correctly formatted.
- Which countries use IBAN?
- IBAN is used by most European countries and many countries in the Middle East, Caribbean, and North Africa — over 80 countries in total. The US, Canada, Australia, and most of Asia use different account number formats and do not use IBAN.
- Does a valid IBAN mean the account exists?
- No — IBAN validation only confirms the format and checksum are correct. It does not verify that the account is active or that the bank exists. For payment processing, always confirm account details with the recipient directly.