Mastercards start with the number 5. Discover Cards begin with the number 6. The next five digits of the IIN represent the specific issuing bank, also known as the Bank Identification Number or BIN.

MasterCard's unique first digit is 5, while Visa's is always 4. A Discover card's first digit is consistently the number 6. You can further identify credit cards that start with the same first ...

Credit card numbers aren’t a random assortment of digits. Instead, each number on your card has a specific purpose. Here’s how to read your credit card numbers to unlock their meaning.

Your credit card number usually consists of 15 or 16 digits ... Visa starts with 4, a Mastercard is 5 and Discover is 6. Other numbers are used to identify the industry. For instance, 1 and ...