Beijing Supvan Information Technology Co.,Ltd.

Any device whose MAC address begins with A4:93:40 has a network interface built by Beijing Supvan Information 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

A4:93:40

Organization

Beijing Supvan Information Technology Co.,Ltd.

Address

206.2/F,Building No.1.No.1 Gaoxin Three Street. Huilongguan Town,Changping District Beijing Beijing CN 102206

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.