Hunan Greatwall Galaxy Science and Technology Co.,Ltd.

Any device whose MAC address begins with 10:81:B4 has a network interface built by Hunan Greatwall Galaxy Science and 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

10:81:B4

Organization

Hunan Greatwall Galaxy Science and Technology Co.,Ltd.

Address

No. 39, Jian Shan Road 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.