Original Member and FlyerTalk Evangelist
Join Date: May 1998
Location: Kansas City, MO, USA
Programs: DL PM/MM, AA ExPlat, Hyatt Glob, HH Dia, National ECE, Hertz PC
Posts: 16,579
First digit of 5 is a MasterCard Account ...
5 = MC
4 = Visa
3 = DC or AMEX