TP-LINK TECHNOLOGIES CO.,LTD.

Any device whose MAC address begins with 40:3F:8C has a network interface built by TP-LINK TECHNOLOGIES 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

40:3F:8C

Organization

TP-LINK TECHNOLOGIES CO.,LTD.

Address

2-7th floors of South Building and 3-11th floors of North Building, No. 396, Jucai Road, Changhe Street, Binjiang District Hangzhou City Zhejiang Province, CN 310000

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.