The Card Identification Number (CID/4DBC) is a four-digit, non-embossed (flat) number that is printed on every American Express Card. The CID/4DBC is ALWAYS located ABOVE the embossed (raised) account number on the face of the card. In some instances, the CID/4DBC is located on the left side of the card, but is always above the account number. Some cards have a four-digit number embossed below the account number, but this is not the CID/4DBC. Click here for help with VISA or MasterCard.