what credit card begins with 4
The irony is, this question is irrelevant! Here's what most people don't know: If a credit card starts with the digit 3 then it's always Amex. If it starts with 4 it's always Visa. 5 is always MasterCard and 6 is always Discover.So if programmers just put a little extra effort into their shopping cart code, they could easily discern what type of card it is. For example, a card that starts with 3715 will be Amex, 4024 will be Visa, etc.f it starts with 4 it's always Visa. 5 is always MasterCard and 6 is always Discover. So if programmers just put a little extra effort into their shopping cart code, they could easily discern what type of card it is. For example, a card that starts with 3715 will be Amex, 4024 will be Visa, etc.