BIOS Corporation

Any device whose MAC address begins with D0:12:42 has a network interface built by BIOS 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

D0:12:42

Organization

BIOS Corporation

Address

2-43-15 Tomigaya Shibuya-ku TOKYO JP 151-0063

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.