NORMA

Any device whose MAC address begins with 78:D3:ED has a network interface built by NORMA. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

78:D3:ED

Organization

NORMA

Address

Achasan-ro 7na-gil, Seongdong-Gu Seoul KR 04795

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.