Shenzhen Jiuzhou Electric Co.,LTD

Any device whose MAC address begins with B4:CF:DB has a network interface built by Shenzhen Jiuzhou Electric 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

B4:CF:DB

Organization

Shenzhen Jiuzhou Electric Co.,LTD

Address

6F,Jiuzhou Electric Building,Southern No.12RD.,Hi-Tech Industrial Park,Nanshan District, Shenzhen Guangdong CN 518057

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.