Lumi United Technology Co., Ltd

Any device whose MAC address begins with 54:EF:44 has a network interface built by Lumi United 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

54:EF:44

Organization

Lumi United Technology Co., Ltd

Address

8th Floor, JinQi Wisdom Valley, No.1 TangLing Road, LinXian Ave, Taoyuan Residential District,Nanshan District ShenZhen GuangDong CN 518055

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.