DAYOUPLUS

Any device whose MAC address begins with 8C:31:E2 has a network interface built by DAYOUPLUS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

8C:31:E2

Organization

DAYOUPLUS

Address

3F 509, Dunchon-daero, Jungwon-gu, Seongnam-si, Gyeonggi-do, Republic of Korea Seongnam-si Gyeonggi-do KR 13217

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.