Nearly every piece of computer equipment has a FCC ID number, usually printed on the circuit board. If you are unable to determine the manufacturer of a card then the FCC database will be able to help. There is also something called a FCC REG, which has a different purpose. Only the FCC IDs can be searched below. An FCC ID number listed on computer equipment should resemble one of the below formats.
Keep in mind that some hardware manufacturers may list their model number next to the FCC. Contact the manufacturer for information about that number.