Shenzhen Trylong Smart Science and Technology Co., Ltd.

Any device whose MAC address begins with 18:40:A4 has a network interface built by Shenzhen Trylong Smart Science and 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

18:40:A4

Organization

Shenzhen Trylong Smart Science and Technology Co., Ltd.

Address

15E, qingdian building, No#6007, Binhe road, futian district Shenzhen city Guangdong Province CN 518100

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.