Gyeyoung I&T

Any device whose MAC address begins with 04:36:04 has a network interface built by Gyeyoung I&T. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

04:36:04

Organization

Gyeyoung I&T

Address

6F, Woosung Bldg. 1000-1, Daechi-dong Seoul KR 135-502

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.