Equipment that attaches to the public telephone network (modems, faxes, security systems) are assigned a registration number by the FCC. With the number you can quickly find who the original manufacturer of a component is, and what it is. This is NOT the same as a FCC ID, and it is not the same as a 10-digit FCC Registration Number (FRN)

For more detail instructions on how to use this search, please reference this guide