Shanghai Railway Communication Factory

Any device whose MAC address begins with B0:65:63 has a network interface built by Shanghai Railway Communication 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

B0:65:63

Organization

Shanghai Railway Communication Factory

Address

No.179 West Jiangchang road Shanghai CN 200436

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.