Focus System Inc.

Any device whose MAC address begins with 00:1B:34 has a network interface built by Focus System 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

00:1B:34

Organization

Focus System Inc.

Address

19F-1, No. 266 Wen Hwa 2nd Rd., Sec. 1 Linkou Taipei County TW

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.