IBAN is an alphanumeric code used in transactions between bank accounts within the SEPA area. It is composed of:
IBAN can be used for both national and international transactions.
In the United Kingdom, the IBAN is made up of the following elements: country code (2 letters) "GB", 2 check digits, 4 digits of the bank code, 6 digits of the sort code, and 8 digits of the bank account number. In the UK, IBAN is always 22 characters long.