Chuango Security Technology Corporation

Any device whose MAC address begins with 84:DF:19 has a network interface built by Chuango Security Technology Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

84:DF:19

Organization

Chuango Security Technology Corporation

Address

6-17, Overseas Students Pioneer Park, Fuzhou Fujian CN 350015

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.