Kontrolnext Technology (Beijing) Ltd.

Any device whose MAC address begins with B0:3B:1B has a network interface built by Kontrolnext Technology (Beijing) 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

B0:3B:1B

Organization

Kontrolnext Technology (Beijing) Ltd.

Address

Room 703, 7/F, Building No.16, Shixing Avenue 30#, Shijingshan District Beijing CN 100041

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.