BAEKCHUN I&C Co., Ltd.

Any device whose MAC address begins with 40:9F:C7 has a network interface built by BAEKCHUN I&C 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

40:9F:C7

Organization

BAEKCHUN I&C Co., Ltd.

Address

67-5, Gyesu-dong Bucheon-si Gyeonggi-do KR 422-070

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.