What Do Credit Card Numbers Mean?
Have you ever wondered what sort of information in encoded in your credit card number? Well, wonder no more, I have the answer…
The first digit is the system number, and it’s always a 3, 4, 5, or 6. Here’s how it works:
3 = Travel or entertainment cards such as Amex or Diner’s Club
4 = Visa
5 [...]


