General Bandwidth

Any device whose MAC address begins with 00:01:B1 has a network interface built by General Bandwidth. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:01:B1

Organization

General Bandwidth

Address

12303-B Technology Blvd. Austin TX US 78727

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.