ZNV

Any device whose MAC address begins with 04:D4:37 has a network interface built by ZNV. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

04:D4:37

Organization

ZNV

Address

4/F, W1-A, Bldg, Gaoxin S, 1st Ave., Hi-tech Park, Nanshan District, Shenzhen, P.R.C Shenzhen Guangdong US 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.