Trust Power Ltd.

Any device whose MAC address begins with D4:F0:27 has a network interface built by Trust Power 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

D4:F0:27

Organization

Trust Power Ltd.

Address

13 Berkley Street London GB W1J 8DU

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.