System In Frontier Inc.

Any device whose MAC address begins with 20:FE:CD has a network interface built by System In Frontier Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

20:FE:CD

Organization

System In Frontier Inc.

Address

4F Shinsuzuharu Bldg. 2-8-3 Akebonocyo Tachikawa-shi Tokyo JP 190-0012

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.