Grotech Inc

Any device whose MAC address begins with 38:43:E5 has a network interface built by Grotech 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

38:43:E5

Organization

Grotech Inc

Address

19, Ojeongongeop-gil Uiwang-si Gyeonggi-do KR 16072

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.