Qidi Technology (shanghai) Co.,Ltd.

Any device whose MAC address begins with 28:39:84 has a network interface built by Qidi Technology (shanghai) 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

28:39:84

Organization

Qidi Technology (shanghai) Co.,Ltd.

Address

Building C, No. 888 Huanhu West Second Road, Pudong New District, Shanghai City, China shanghai CN 200127

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.