Zhejiang Dahua Technology Co., Ltd.

Any device whose MAC address begins with 3C:EF:8C has a network interface built by Zhejiang Dahua Technology 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

3C:EF:8C

Organization

Zhejiang Dahua Technology Co., Ltd.

Address

NO.1199 Bin An Road,Binjiang District,HangZhou,P.R.China HangZhou ZheJiang CN 310053

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.