GES Co, Ltd

Any device whose MAC address begins with 00:12:3D has a network interface built by GES 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

00:12:3D

Organization

GES Co, Ltd

Address

Room 710, Bundang Technopark, 700 Gyeonggi-Do KR 463-400

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.