Shenzhen Ginwave Technologies Ltd.

Any device whose MAC address begins with 84:21:41 has a network interface built by Shenzhen Ginwave Technologies 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

84:21:41

Organization

Shenzhen Ginwave Technologies Ltd.

Address

4/F,R2-A,High-Tech Industrial Park 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.