Beijing Hanbang Technology Corp.

Any device whose MAC address begins with E4:7D:5A has a network interface built by Beijing Hanbang Technology Corp.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

E4:7D:5A

Organization

Beijing Hanbang Technology Corp.

Address

4/F,Skirt Building Haidian District Beijing CN 100080

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.