Regexp::Common::CC -- provide patterns for credit card numbers.

    use Regexp::Common qw /CC/;

    while (<>) {
        /^$RE{CC}{Mastercard}$/   and  print "Mastercard card number\n";
    }

Please consult the manual of Regexp::Common for a general description of the works of this interface.

Do not use this module directly, but load it via Regexp::Common.

This module offers patterns for credit card numbers of several major credit card types. Currently, the supported cards are: Mastercard, Amex, Diners Club, and Discover.

Regexp::Common for a general description of how to use this interface.

http://www.beachnet.com/~hstiles/cardtype.html

Credit Card Validation - Check Digits

http://euro.ecom.cmu.edu/resources/elibrary/everycc.htm

Everything you ever wanted to know about CC's

http://www.webopedia.com/TERM/L/Luhn_formula.html

Luhn formula

Damian Conway (damian@conway.org) and Abigail (regexp-common@abigail.be).

This package is maintained by Abigail (regexp-common@abigail.be).

Bound to be plenty. Send them in to regexp-common@abigail.be.

This software is Copyright (c) 2001 - 2009, Damian Conway and Abigail.

This module is free software, and maybe used under any of the following licenses:

 1) The Perl Artistic License.     See the file COPYRIGHT.AL.
 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2.
 3) The BSD Licence.               See the file COPYRIGHT.BSD.
 4) The MIT Licence.               See the file COPYRIGHT.MIT.