Beijing Railway Signal Factory

Any device whose MAC address begins with 8C:5F:DF has a network interface built by Beijing Railway Signal Factory. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

8C:5F:DF

Organization

Beijing Railway Signal Factory

Address

No.2 Sicun Xilu Langfa,Huangcun, Beiijng CN 102613

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.