An introduction & features

Have you ever wondered what the information on your credit card actually means? 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.

  • Easy-to-understand reports show if your number is valid with a Luhn check
  • Learn where a card was issued
  • Find the account number on your credit card
  • Works with Mastercard, Visa, AMEX, Discover, and more
  • Also includes support for dining, club and air cards

How to use & examples

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!

Here are some examples of valid credit card numbers and completely invalid numbers. Verisign kindly provides the following test numbers:

Master Card Visa American Express (AMEX)
Master Card Visa American Express
Master Card Visa American Express
Visa Amex Corporate
Diner's Club Discover JCB
Diner's Club Discover JCB
Diner's Club Discover JCB