What type of credit cards starts with 3715?

Credit cards that start with the digits 3715 are typically American Express cards. The first two digits of a card number, known as the Issuer Identification Number (IIN) or Bank Identification Number (BIN), help identify the issuing bank and card type. American Express cards usually have a 15-digit format and begin with either 34 or 37, with 3715 being a specific range within that.