Z-TEC

Any device whose MAC address begins with BC:39:D9 has a network interface built by Z-TEC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

BC:39:D9

Organization

Z-TEC

Address

Donyu 1 Ro Paju Kyeongkido KR 10832

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.