FuJian Elite Power Tech CO.,LTD.

Any device whose MAC address begins with A4:99:81 has a network interface built by FuJian Elite Power Tech 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

A4:99:81

Organization

FuJian Elite Power Tech CO.,LTD.

Address

8th Floor£¬56 GuanRi Road Xiamen Fujian CN 361009

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.