Power Ethernet

Any device whose MAC address begins with D4:D2:49 has a network interface built by Power Ethernet. 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:D2:49

Organization

Power Ethernet

Address

4th Floor, Holborn Gate London GB WC2A 1AH

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.