What I hate about the Internet is...having to select my credit card type
CARD TYPES............PREFIX................WIDTH
American Express.....34, 37....................15
Diners Club..............300 to 305, 36........14
Carte Blanche...........38..........................14
Discover...................6011.......................16
EnRoute...................2014, 2149.............15
JCB..........................3............................16
JCB..........................2131, 1800..............15
Master Card.............51 to 55..................16
Visa..........................4...........................13, 16
Therefore, it stands to reason that by looking at the prefix of a credit card, you can derive the type of the card. And finally, as a programmer, I know that Verisign does not require you to send in the type, only the number itself and a few other bits of information.
Labels: Annoyances, Computers, Internet, Philosophy, Software, WTF
