Infrared Integrated Systems Ltd

Any device whose MAC address begins with 00:21:AC has a network interface built by Infrared Integrated Systems 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

00:21:AC

Organization

Infrared Integrated Systems Ltd

Address

Park Circle, Tithe Barn Way Northampton Northants GB NN4 9BG

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.