Nippon Koei Power Systems Co., Ltd.

Any device whose MAC address begins with 00:08:CF has a network interface built by Nippon Koei Power Systems Co., 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

00:08:CF

Organization

Nippon Koei Power Systems Co., Ltd.

Address

2940 Shinyoshida-cho Kohoku-ku Yokohama JP 223-8506

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.