Bridgeworks Ltd.

Any device whose MAC address begins with 00:04:1B has a network interface built by Bridgeworks Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:04:1B

Organization

Bridgeworks Ltd.

Address

Unit 1 Aero Centre Ampress Park Lymington Hampshire GB SO41 8QF

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.