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10 Oct 2010
Credit Card Checker
Most credit card issuers use Luhn algorithm (it is sometimes called Mod 10 algorithm) for checking their card number.  So, merchants can use the card number to find out the issuer and have an initial validation of the card. 

The following is a small program for credit card number checker.  You can enter a credit card number and then click the  "Check" button to validate the card and find out the issuer.

Credit Card Number


Please feel free to download my Credit Card Checker functions in VB.Net from here.

For other information about Credit Card and its numbering system, please visit:
http://en.wikipedia.org/wiki/Bank_card_number
 


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