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Payment card numbers are composed of 8 to 19 digits, [1] The leading six or eight digits are the issuer identification number (IIN) sometimes referred to as the bank identification number (BIN). [2]: 33 [3] The remaining numbers, except the last digit, are the individual account identification number. The last digit is the Luhn check digit.
It specifies "a numbering system for the identification of the card issuers, the format of the issuer identification number (IIN) and the primary account number (PAN)", [1] and procedures for registering IINs. [2] It was first published in 1989. ISO/IEC 7812 has two parts: Part 1: Numbering system; Part 2: Application and registration procedures
ISO/IEC 7813 is an international standard codified by the International Organization for Standardization and International Electrotechnical Commission that defines properties of financial transaction cards, such as ATM or credit cards.
The numbers on a credit card help identify the credit card network, the company that issued the card and the cardholder. Credit card numbers are either 15 or 16 digits, with each digit having its ...
All American Express account numbers start with a 37 or 34, while credit card account numbers issued by Mastercard start with a 5. After those first numbers, the next six to eight digits indicate ...
The first 5 digits of the account number can be used to identify the bank (originally also the branch, but clients can now often keep their account number when they move to another branch). Spain also has a similar format, with the first 4 digits identifying the banking company, the next 4 identifying the branch, the next 2 being the checksum ...
The final digit of a Universal Product Code, International Article Number, Global Location Number or Global Trade Item Number is a check digit computed as follows: [3] [4]. Add the digits in the odd-numbered positions from the left (first, third, fifth, etc.—not including the check digit) together and multiply by three.
Therefore, systems that pad to a specific number of digits (by converting 1234 to 0001234 for instance) can perform Luhn validation before or after the padding and achieve the same result. The algorithm appeared in a United States Patent [ 1 ] for a simple, hand-held, mechanical device for computing the checksum.