KYOWA Electric & Machinery Corp.

Any device whose MAC address begins with 00:12:90 has a network interface built by KYOWA Electric & Machinery Corp.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:12:90

Organization

KYOWA Electric & Machinery Corp.

Address

4-8-16,Masuizumi Kanazawa Ishikawa JP 921-8025

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.