Sonifex Ltd.

Any device whose MAC address begins with D0:A4:B1 has a network interface built by Sonifex 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

D0:A4:B1

Organization

Sonifex Ltd.

Address

61 Station Road Irthlingborough Northamptonshire GB NN9 5QE

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.