Bank Card Number | Credit Card Number

Credit Card Number
The credit card numbers have a particular sum of internal system and are utilized according to a shared numbering scheme. The credit card numbers have to be validated with the database of the unexpired credit card numbers to avoid fraud transactions or misusing of the site with wrong information. Credit card numbers are particular instances of ISO 7812 numbers.

About Credit Card Number

The credit card numbers are particular forms of ISO 7812 numbers. An ISO 7812 number comprises an issuer identifier number or IIN (six digit), a major industry identifier number or MII (single digit), a single digit verification number, which utilizes the Luhn Algorithm, as well as an account number. The major industry identifier number or MII is regarded as a constituent of the issuer identifier number.
Credit card numbers have the general format:

xxxx xxxx xxxC xxxx (VISA)
xxxx xxxxxx xCxxx (American Express)

Digit 12 (C) is the checksum digit. The Luhn algorithm (Appendix A) for Visa and AMEX card is applied in both formats.

Prefixes of Credit Card Number

The prefix of a credit card number is the serial arrangement of figures at the commencement of the number that ascertains the credit card network under which the number falls. The initial six digits of the credit card number are termed as the Bank Identification Number or BIN. These help recognize the company, which is the issuer of the card. The remainder of the number is distributed by the credit card issuer. The length of the credit card number is the number of figures or digits.

The lengths and prefixes for the most popular forms of credit card are the following:

Type of Card	Length	Prefix	Coverage chart Symbol	Validation
Visa	13, 16	4	Visa	Luhn Algorithm
MasterCard	16	51 to 55	MC	Luhn Algorithm
Visa Electron	16	417500, 4917, 4913, 4508, 4844	Visa	Luhn Algorithm
American Express	15	34, 37	AmEx	Luhn Algorithm
Discover Card	16	6011, 65	Disc	Luhn Algorithm
Diners Club Carte Blanche	14	300 to 305	DC-CB	Luhn Algorithm
Diners Club International	14	36	DC-Int	Luhn Algorithm
Diners Club Enroute	15	2014, 2149	DC-eR	No Validation
Diners Club US & Canada	16	55	DC-UC	Luhn Algorithm
Maestro (Debit Card)	16, 18	5020, 5038, 6304, 6759	Maes	Luhn Algorithm

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	U.S. Bank

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