Arm Ltd

Any device whose MAC address begins with 84:67:9A has a network interface built by Arm 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

84:67:9A

Organization

Arm Ltd

Address

110 Fulbourn Road Cambridge Cambridgeshire GB CB19NJ

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.