TerraSem Co.,Ltd

Any device whose MAC address begins with F4:B6:E5 has a network interface built by TerraSem Co.,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

F4:B6:E5

Organization

TerraSem Co.,Ltd

Address

9,Gwahaksaneop 5-ro Cheongwon-Gu ChungBuk KR 363-885

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.