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 digits from position 7 up to the second-to-last digit represent your unique individual account within that bank.
: 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
