Question 1

What is an IBAN?

Accepted Answer

An International Bank Account Number (IBAN) is a standard numbering system developed to identify bank accounts across national borders. It consists of a country code, check digits, and a bank/account number.

Question 2

How many countries are supported?

Accepted Answer

We support IBAN validation for over 70 countries, including all EU/EEA member states, the UK, and many countries in the Middle East, Africa, and Latin America.

Question 3

How does the validation work?

Accepted Answer

We check three things: (1) the country code is recognized, (2) the length matches the expected length for that country, and (3) the MOD 97 checksum is valid per the ISO 13616 standard.

Question 4

Is my IBAN stored or transmitted?

Accepted Answer

No. All validation happens entirely in your browser. Your IBAN is never sent to any server.

Question 5

What is the bank code?

Accepted Answer

The bank code (also called BIC or SWIFT code prefix) identifies the financial institution. It is extracted from the IBAN based on the country's IBAN structure. The exact meaning varies by country.

IBAN Validator

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