Kanematsu Electronics, Ltd.

Any device whose MAC address begins with 00:09:B1 has a network interface built by Kanematsu Electronics, 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

00:09:B1

Organization

Kanematsu Electronics, Ltd.

Address

17-5, Kyobashi 2-chome Chuo-ku Tokyo JP 104-8338

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.