A credit card number is a unique 14 to 16-digit identifier that serves as a "digital fingerprint" for your account. While these digits may seem random, they follow a strict global standard that encodes information about the card network, the issuing bank, and your specific account. Anatomy of a Credit Card Number
: The final digit is calculated using the Luhn Algorithm . It is used by payment systems to instantly verify the card number's validity and catch entry errors. The Rise of "Numberless" Credit Cards number credit card
: The first digit identifies the card's industry and network. For example, 4 represents Visa and 5 represents Mastercard . A credit card number is a unique 14
: The digits from position 7 up to the second-to-last digit represent your unique individual account within that bank. It is used by payment systems to instantly
Standardized by international organizations, the digits are typically broken into four functional groups: