Shenzhen Jinhengjia Electronic Co., Ltd.

Any device whose MAC address begins with 30:39:55 has a network interface built by Shenzhen Jinhengjia Electronic 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

30:39:55

Organization

Shenzhen Jinhengjia Electronic Co., Ltd.

Address

4-6 Floors, Factory Building, Jijia Industrial Park, Shenzhen Guangdong CN 518112

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.