Shenzhen Baseus Technology Co., Ltd.

Any device whose MAC address begins with A4:40:3D has a network interface built by Shenzhen Baseus 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

A4:40:3D

Organization

Shenzhen Baseus Technology Co., Ltd.

Address

2nd Floor, Building B, Baseus Intelligence Park, No.2008, Xuegang Rd,Gangtou Community,Bantian Street, Longgang District Shenzhen CN 518172

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.