The numbers on a credit card help identify the credit card network, the company that issued the card and the cardholder.

Cell phones, fax machines and pagers are dialing through the country's supply of phone numbers. The Federal Communications Commission, aware of the dwindling supply of 10-digit phone numbers and ...

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 the ...