Hui Zhou Gaoshengda Technology Co.,LTD

Any device whose MAC address begins with 78:66:9D has a network interface built by Hui Zhou Gaoshengda Technology 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

78:66:9D

Organization

Hui Zhou Gaoshengda Technology Co.,LTD

Address

No.2, Jin-da Road, Huinan High-tech Industrial Park, Hui-ao Avenue Huizhou Guangdong CN 516025

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.