Roberts Radio limited

Any device whose MAC address begins with 00:1B:49 has a network interface built by Roberts Radio limited. 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:49

Organization

Roberts Radio limited

Address

Swinton Works Mexborough South Yorkshire GB S64 8AJ

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.