What is a 12 digit card number?
Matthew Harrington
Updated on February 17, 2026
Since the initial 6 digits of a credit card number are the issuer identifier, and the final digit is the check digit, this means that the maximum length of the account number field is 19 – 7, or 12 digits. Each issuer therefore has a trillion (10 raised to the 12th power, or 1,000,000,000,000) possible account numbers.
What is a card number example?
A credit card number is usually 15-16 digits long, but it could be as many as 19 digits or as few as 13 in some cases….Issuer Identification Numbers: The First 6 Digits.
| Issuer | Example Identification Number | Meaning |
|---|---|---|
| US Bank | 403766 | U.S. Bank Visa |
| Barclays | 559309 | Barclays World Mastercard |
What do Visa card numbers start with?
4
Visa cards – Begin with a 4 and have 13 or 16 digits. Mastercard cards – Begin with a 5 and has 16 digits. American Express cards – Begin with a 3, followed by a 4 or a 7 has 15 digits.
How many digits does a credit card have?
The maximum length of any credit card is 19 digits. Let’s take a closer look at the length of credit card numbers for various card types. Credit cards numbers are not just a series of random numbers produced for each card issued.
How many digits are in a Master Card?
CC issued by Visa and Master Cards have 16 digits number. If the card starts with 4, its issued by Visa. If 5 then by Master Card. The 2nd through 6th digits are the issuer bank number.
What do the numbers on a Visa card mean?
Visa Traditional. Visa Signature. Visa Infinite. Conclusion on Visa Card Number. A Visa card number is the 16-digit code printed on either the front or the back of your credit card. This combination of numbers is unique to each credit card. Each credit card number also contains identifiers that indicate the card is a Visa.
What’s the difference between Bank and credit card numbers?
Different credit cards use slightly different numbering systems. With Visa, for instance, digits two through six are the bank number. With MasterCard, the bank number appears in digits two and three, two through four, two through five, or two through six.
