Validation of the Luhn Check Sum for any Visa, Mastercard, Discover and American Express credit cards. Our Perl program can also encrypt the number for safety in transferring the card from your secure eCommerce site to you by email and you avoid bank fees for doing this for you.

This program demonstrates how the Luhn validity of a credit card number. It will not tell if the credit card will be accepted by the bank but it will tell you it is a valid number by the Luhn check sum. This is useful on order forms helping a customer enter his card number correctly.

Try the numbers below or see if you are lucky at creating your own number to pass with a valid Luhn Check Sum. Demo Form is in PaleGoldenRod Table below!

Card Type	Valid Test Number	Invalid Test Number
VISA	4232 8753 6127 6550 or 4372 8721 7137 6431	4372 8721 7137 6421 or 4212 8953 6137 6450
Discover	6011 5783 6721 1256 or 6011 2271 5596 1361	6011 5783 6721 1255 or 6011 2271 5596 1361
Master Card	5213 4655 2197 4201 or 5743 2188 6422 1394	5213 4655 2197 4301 or 5743 2188 6422 1396
American Express	3715 783101 37654 or 3724 671538 27812	3715 793101 37654 or 3724 671538 27816
CardType: Visa Master Card American Express Discover Credit Card Number: Card Verification Code:   Card's Expiration Month: 01 02 03 04 05 06 07 08 09 10 11 12 Expiration Year: 2015 2015 2015 2013 2015 2015 2016 2017 2018 2019 2020