The first 4-6 digits of cards are called BIN (Bank Identification Numbers). Every bank has there own. So if you started your own company called codecutter vi

The first 4-6 digits of cards are called BIN (Bank Identification Numbers). Every bank has there own. So if you started your own company called codecutter virtual cards. You will have to get a BIN from Visa & Mastercard. Say your BIN is 5123-45 then all the cards you issue will begin with 5123-45. Anyone in the industry can obtain a list of all who owns' all BINs and the type of cards is it. Gift card, virtual card, credit card, debit card, etc.