Marconi Communications

Any device whose MAC address begins with 00:20:48 has a network interface built by Marconi Communications. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:48

Organization

Marconi Communications

Address

1000 Fore Drive Warrendale PA US 15086-7502

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.