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Make sure that the Credit Card or Debit Card Number follows the proper format.The length is in between 13 to 19 characters and contains only numbers and no space in between.Simply type your credit card number into the form above, and hit enter.You can enter the number in either AAAABBBBCCCCDDDD or AAAA-BBBB-CCCC-DDDD format!A check digit is a digit added to a number (either at the end or the beginning) that validates the authenticity of the number.A simple algorithm is applied to the other digits of the number which yields the check digit.
A quick read of anatomy of a credit card shows me the possibility of presenting an easy to use tool to decode the hidden secrets of your credit card code, with no risk and no pain.
You should use these numbers only to test your validation strategies and for bogus data.
Without a valid owner name, an expiration date and a valid CVV code, they can't be used for real transactions.
Each number position has a special purpose among defining the type of issuer (IIN), the account number, a check-sum digit, etc...
The following link specifies all group of digits and their purpose: Cracking the credit card digits Do you need a currency converter for your online purchases?