Tokyo Boeki Medisys Inc.

Any device whose MAC address begins with 90:45:06 has a network interface built by Tokyo Boeki Medisys 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

90:45:06

Organization

Tokyo Boeki Medisys Inc.

Address

1-14-21, Higashitoyoda Hino Tokyo JP 191-0052

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.