Hangzhou Hylin IoT Techonology Co.,Ltd.

Any device whose MAC address begins with B8:3B:8F has a network interface built by Hangzhou Hylin IoT Techonology 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

B8:3B:8F

Organization

Hangzhou Hylin IoT Techonology Co.,Ltd.

Address

No.80 Pingshui WestRoad xihu District Hangzhou China Hangzhou CN 310012

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.