Nain Inc.

Any device whose MAC address begins with F8:90:66 has a network interface built by Nain Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

F8:90:66

Organization

Nain Inc.

Address

Aoyamadai building 902, Shibuya 2-9-10, Shibuya-ku Tokyo JP 150-0002

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.