Brother Industries, LTD.

Any device whose MAC address begins with B4:22:00 has a network interface built by Brother Industries, 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

B4:22:00

Organization

Brother Industries, LTD.

Address

15-1, Naeshirocho, Mizuho-ku NAGOYA JP 4678561

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.