# Credit card numbers starting with 7

##### *2020-01-25 03:07*

Number A is my credit card number. The 4 groups don't have a meaning. They do, actually. First digit is 4 for VISA, 5 for Mastercard, 6 for DiscoverDiners Club, 3 for American ExpressDiners Club (those are shorter than 16). Also, first 6 digits for Visa and Mastercard are code numbersThe maximum length of a credit card number is 19 digits, with the maximum length of the account number field being 12 digits (initial sixdigit issuer identifier minus the final digit check number). Each issuer has 1 trillion possible account numbers. credit card numbers starting with 7

Jun 26, 2018 If you see a credit card number that starts with a 4 and contains 19 digits, you can assume it's a Visa. Mastercard and Discover account numbers contain 16 digits.