HUMAX Co., Ltd.

Any device whose MAC address begins with DC:D3:21 has a network interface built by HUMAX 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

DC:D3:21

Organization

HUMAX Co., Ltd.

Address

HUMAX Village, 11-4, Sunae-dong, Bundang-gu Seongnam-si Gyeonggi-do KR 463-825

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.