12mm Health Technology (Hainan) Co., Ltd.

Any device whose MAC address begins with 3C:40:15 has a network interface built by 12mm Health Technology (Hainan) 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

3C:40:15

Organization

12mm Health Technology (Hainan) Co., Ltd.

Address

Room A20-860, 5th Floor, Building A, Entrepreneurship Incubation Center, No. 266 Nanhai Avenue, National Hi-Tech Industrial Development Zone, Haikou City, Hainan Province, China Haikou Hainan CN 570100

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.