SJ Tek Co. Ltd

Any device whose MAC address begins with 00:05:27 has a network interface built by SJ Tek 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

00:05:27

Organization

SJ Tek Co. Ltd

Address

Ho gae Dong 976-5, Dong An Ku, KR

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.