eZEX corporation

Any device whose MAC address begins with C8:31:68 has a network interface built by eZEX corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

C8:31:68

Organization

eZEX corporation

Address

Rm 508, Ssangyong IT Twin-Tower II, 442-5 Seongnam-si Gyeonggi-do KR 462-120

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.