What does Account number mean?
One of the main features of a credit card is an encoded and embossed number on the surface of the card itself. This number is known as the account number which is a unique sequence of numbers and letters generated by a bank or other financial institution. This number is assigned to a credit card owner who is a customer at the specific institution. The number of the digits in the account number vary from country to country.
The International Bank Account Number, or IBAN for short, is basically the same thing only this is an internationally accepted number, usable anywhere in the World. This code is an extended version of the original account number, prefixed by a national bank code. For instance the IBAN format in the United Kingdom looks like this: GBkk BBBB SSSS SSCC CCCC CC, where the two k-s are the check digits from the whole number, B-s stand for an alphabetical bank code, S-s stand for an internal sort code usually a specific branch, and Cs are basically the numbers of a bank account, which should be the same as the Account number used by the owner nationally.