The last digit check used by credit card companies is based on the Luhn algorithm. This number helps ensure that the correct credit card number is typed when entering it into a computer. The remaining digits not including the last digit are the numbers that identify the card holder.You can verify the issuer of a particular by typing in the first 6 digits of a card number into the BIN Database. For example, the issuer of your Visa might have been Chase who could be identified by this 6 digit number. This number tells you who issued the card. The first six digits of the credit card number is known as the Bank Identification Number or Issuer Identification Number.If the card is a Diner’s Club MasterCard, it will have a first number of 5. Diner’s Club also starts with a 3, second number is 0, 6, 8, or 9.Do NOT give your credit card information to anyone asking for it through an unsecured channel (for example by email). Please note that this tool does not store any of the credit card numbers you enter. American Express starts with a 3, second number is a 4 or 7. You can enter the card number either in 4 digit groups or without any spaces.The first digit(s) of each credit are as follows: However, you have to look at the second numbers for American Express and Diner’s Club since they share the same first digit. The first digit of the credit card number tells you the credit card issuer.You can identify a few things by looking at certain numbers on your card. Length of Credit Card Numbers Issuer Length of Credit Card Number American Express 15 Diner's Club 14 or 16 Discover 16 or 19 MasterCard 16 Visa 13, 16, or 19 What Credit Card Numbers Mean?Ĭredit cards numbers are not just a series of random numbers produced for each card issued.
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