Hangzhou Prevail Optoelectronic Equipment Co.,LTD.

Any device whose MAC address begins with 30:71:B2 has a network interface built by Hangzhou Prevail Optoelectronic Equipment 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

30:71:B2

Organization

Hangzhou Prevail Optoelectronic Equipment Co.,LTD.

Address

Industrial Development Area, Guali Town, Hangzhou City Zhe Jiang CN 311241

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.