Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd.

Any device whose MAC address begins with C0:27:B9 has a network interface built by Beijing National Railway Research & Design Institute of Signal & Communication 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

C0:27:B9

Organization

Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd.

Address

Building No.18, Huayuan YiLi,Fengtai District, Beijing CN 100073

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.