Credit Card Information
Credit cards must be unique, so a standard was developed to assign numbers to credit cards. Here's how you can tell something about any credit card number by looking at the various digits of the number.
The first digit is the credit card system:
- 3 - Travel and Entertainment Cards
- 37 - American Express
- 38 - Diners Club
- 4 - Visa
- 5 - Master Card
- 6 - Discover Card
For the rest of the digits, the following applies:
- American Express
- 3 - 4: type and currency
- 5 - 11: account number
- 12 - 14: card number in account
- 15: check digit
- Visa
- 2 - 6: bank number
- 7 - 12 or 15: account number
- 13 or 16: check digit
- MasterCard
- 2 - 3, 4, 5 or 6: bank number
- rest up to 15: account number
- 16: check digit