Seibu Electric Co.,

Any device whose MAC address begins with F8:69:71 has a network interface built by Seibu Electric Co.,. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

F8:69:71

Organization

Seibu Electric Co.,

Address

1458-7 Hachioji Tokyo JP 193-0941

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.