List of Countries using the IBAN standard

The countries above are listed in the IBAN Registry, which is managed by The Society for Worldwide Interbank Financial Telecommunication (SWIFT).

The International Bank Account Number (IBAN) is an international system used to identify bank accounts across countries in order to facilitate the communication and processing of international transactions. It was first used by the European Committee for Banking Standards (ECBS), and later became an international standard under ISO 13616:1997. The current standard is ISO 13616:2007, which indicates SWIFT as the formal registrar. SWIFT is the authority for this registry under ISO-13616-2. This standard outlines the roles and responsibilities of SWIFT to ensure compliant IBAN formatting.

The IBAN structure and compliant formats are defined in ISO-13616-1. The IBAN bank account numbering format was originally developed to facilitate payments within the European Union and has been implemented by most European countries and multiple countries in the other parts of the world (Middle East and in the Caribbean). As of March 2018, 75 countries are using the IBAN numbering system.

An IBAN consists of up to 34 alphanumeric characters comprising: a country code; two check digits; and the basic bank account number (BBAN) which can be up to 30 alphanumeric characters that are country-specific. The BBAN contains the domestic account number, branch identifier, and potential routing information (routing info is dependant on each country). The check digits enable validation of the bank account number at source to confirm its integrity before submitting a transaction.

International bank transactions use either an IBAN or the ISO 9362 Business Identifier Code system (BIC or SWIFT code) in conjunction with the BBAN (Basic Bank Account Number).