A & R Cambridge

Any device whose MAC address begins with 00:1B:7C has a network interface built by A & R Cambridge. 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:7C

Organization

A & R Cambridge

Address

Pembroke Avenue Cambridge CAMBS GB CB25 9QR

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.