IBAN Checker - Validate IBAN Numbers

Enter an IBAN number below to validate its structure and check digits. Our tool verifies the country code, length, BBAN format, and MOD-97 checksum.

What is an IBAN?

An International Bank Account Number (IBAN) is a standard international numbering system used to identify bank accounts across national borders. It consists of a two-letter country code, two check digits, and up to 30 alphanumeric characters for the Basic Bank Account Number (BBAN).

How IBAN Validation Works

  1. Check the country code (first 2 characters) against known IBAN countries
  2. Verify the total length matches the expected length for that country
  3. Validate the BBAN structure against the country-specific format
  4. Perform MOD-97 checksum validation: rearrange the IBAN, convert letters to numbers, and verify the remainder equals 1

Disclaimer: The data provided on this website is for informational purposes only. While we strive to keep the information accurate and up to date, we make no guarantees about the completeness, reliability, or accuracy of the data. Banking codes and formats may change without notice. Always verify critical banking information with your financial institution before making transactions.