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Still a very simple ActiveX DLL. You provide a credit card number and it returns true or false according to the validity + the name of the card : Version 1.8 recognizes Visa, Amex, Diners, enRoute, JCB, Discover/Novus, Autralian Bankcard etc. It has now complete install/uninstall features.  Software Downloads > Programming > JCB Credit Card Validator
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