How to tell if cc number is Visa/MC/AMEX/Diners/Etc..
Is there any test I can do to determine what "type" a certain card number is?
I have a card number, but need to know if it's visa or mastercard...
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The card number itself comes from ISO 7812 standards. 4 and 5 on a magnetic strip identifies the card as banking and financial and 6 will identify the strip as merchandizing and banking. And three is actually travel and entertainment.
MasterCard will usually begin with 51-55 with 16 digits.
Visa credit card numbers will begin with a 4 and have 13 or 16 digits.
American Express will usually begin with a 34 or 37 and have 15 digits.