CMC

Any device whose MAC address begins with 78:89:73 has a network interface built by CMC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

78:89:73

Organization

CMC

Address

Industriepark De Bruwaan 37B Oudenaarde Oost-Vlaanderen BE 9700

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.