TOPCON CORPORATION

Any device whose MAC address begins with BC:FF:AC has a network interface built by TOPCON CORPORATION. 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:FF:AC

Organization

TOPCON CORPORATION

Address

75-1, Hasunuma-cho Itabashi-ku TOKYO JP 174-8580

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.