Maxtek Optoelectronics Ltd

Any device whose MAC address begins with 40:2F:51 has a network interface built by Maxtek Optoelectronics Ltd. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

40:2F:51

Organization

Maxtek Optoelectronics Ltd

Address

8 Wing Hong Road Kowloon HK 000000

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.