Copper Mountain Technologies

Any device whose MAC address begins with 8C:A9:FD has a network interface built by Copper Mountain Technologies. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

8C:A9:FD

Organization

Copper Mountain Technologies

Address

631 E New York St Indianapolis IN US 46202

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.