Beijing Leadsec Technology Co., Ltd.

Any device whose MAC address begins with 28:0F:C5 has a network interface built by Beijing Leadsec 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

28:0F:C5

Organization

Beijing Leadsec Technology Co., Ltd.

Address

Venus Plaza No.21Zhongguancun Software Park,No.8 Dongbeiwang Xilu, Haidian District Beijing Beijing CN 100193

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.