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.

However, if a zero, 6 or 8 follow the 3, the credit card number belongs to a Diner's Club or Carte Blanche account. More For You. How to Find an ABA Routing Number.

Your credit card number usually consists of 15 or 16 digits, depending on the issuer. Every number of your credit card account conveys information, such as the industry, routing information for ...