Yulinet

Any device whose MAC address begins with 00:12:9C has a network interface built by Yulinet. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:12:9C

Organization

Yulinet

Address

11F, Samhomoolsan B/D 275-6, Yangjae-dong Seocho Seoul KR 137-941

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.