Dongnian Networks Inc.

Any device whose MAC address begins with 7C:DA:84 has a network interface built by Dongnian Networks Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

7C:DA:84

Organization

Dongnian Networks Inc.

Address

90 Wensan Road, Building 8-A303 Hangzhou Zhejiang CN 310012

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.