Shanghai Sunmi Technology Co.,Ltd.

Any device whose MAC address begins with B8:1B:CB has a network interface built by Shanghai Sunmi 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

B8:1B:CB

Organization

Shanghai Sunmi Technology Co.,Ltd.

Address

Room 505, No.388 Song Hu Road, Yang Pu District, Shanghai, China Shanghai Shanghai CN 200433

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.