Check for Well-Formed Credit Card Number
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Card Number:
Card Type:
MasterCard
Visa
American Express
Diners Club
Discover
enRoute
JCB
Luhn Check Only
Expiration Month:
January
February
March
April
May
June
July
August
September
October
November
December
Expiration Year:
2000
2001
2002
2003
2004
2005
Jim O'Donnell,
jim@odonnell.org