IBAN Validator | International Bank Account Number Checker

What is an IBAN?

An International Bank Account Number (IBAN) is a standardized international numbering system developed to identify bank accounts across national borders. It was established to facilitate international payments and reduce errors in cross-border transactions.

IBAN Structure

• Country Code: Two letters identifying the country (e.g., DE for Germany, GB for United Kingdom)
• Check Digits: Two digits that validate the entire IBAN using the MOD-97 algorithm
• Basic Bank Account Number (BBAN): Country-specific format including bank code, branch code, and account number
• Bank Code: Identifies the specific bank institution
• Account Number: Identifies the specific account at the bank

How IBAN Validation Works

1. Verify the country code is valid (first two letters)
2. Check if the IBAN length matches the expected length for that country
3. Verify the BBAN structure adheres to country-specific format rules
4. Perform the MOD-97 check to verify the check digits

When to Use IBAN Validation

• For international money transfers, especially within SEPA (Single Euro Payments Area)
• For domestic transfers in countries that have adopted IBAN standards
• When setting up direct debits or standing orders
• For business transactions and invoice payments across borders

IBAN Facts & Information