Hunan Keyshare Communication Technology Co., Ltd.

Any device whose MAC address begins with CC:EF:03 has a network interface built by Hunan Keyshare Communication 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

CC:EF:03

Organization

Hunan Keyshare Communication Technology Co., Ltd.

Address

No. 19 Building, CEC Software Park, No. 39 jianshan Rd Changsha Hunan CN 410205

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.