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  2. What do the numbers on your credit card mean? - AOL

    www.aol.com/finance/numbers-credit-card-mean...

    Your credit card’s 15 or 16-digit number helps authenticate transactions. ... Credit cards have 15 or 16 digits depending on the credit card network being used. For example, Discover, Mastercard ...

  3. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    Payment card numbers are composed of 8 to 19 digits, [1] The leading six or eight digits are the issuer identification number (IIN) sometimes referred to as the bank identification number (BIN). [2]: 33 [3] The remaining numbers, except the last digit, are the individual account identification number. The last digit is the Luhn check digit.

  4. What Do Credit Card Numbers Mean? - AOL

    www.aol.com/finance/credit-card-numbers-mean...

    A credit card number is the set of digits printed on either the front or back of a physical credit card. Credit card numbers are often 16 digits, but they can be as long as 19 digits or as short ...

  5. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    Diners Club, Discover, JCB, Mastercard, and Visa credit and debit cards have a three-digit card security code. The code is the final group of numbers printed on the back signature panel of the card. New North American Mastercard and Visa cards feature the code in a separate panel to the right of the signature strip. [8]

  6. Credit card - Wikipedia

    en.wikipedia.org/wiki/Credit_card

    The card number's prefix, called the Bank Identification Number (known in the industry as a BIN [14]), is the sequence of digits at the beginning of the number that determine the bank to which a credit card number belongs.

  7. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Therefore, systems that pad to a specific number of digits (by converting 1234 to 0001234 for instance) can perform Luhn validation before or after the padding and achieve the same result. The algorithm appeared in a United States Patent [ 1 ] for a simple, hand-held, mechanical device for computing the checksum.

  8. What Is a Credit Card Security Code and Why Is It Important?

    www.aol.com/credit-card-security-code-why...

    Is a Card Security Code the Same as a CVV? The three- or four-digit code on credit and debit cards can be either a card security code or a card verification value.

  9. Maestro (debit card) - Wikipedia

    en.wikipedia.org/wiki/Maestro_(debit_card)

    Mastercard Maestro is a brand of debit cards and prepaid cards owned by Mastercard that was ... (i.e. by typing the 13 to 19 digits and the expiry date on the ...