Nanjing Yufei Intelligent Control Technology Co.,LTD

Any device whose MAC address begins with AC:77:B9 has a network interface built by Nanjing Yufei Intelligent Control 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

AC:77:B9

Organization

Nanjing Yufei Intelligent Control Technology Co.,LTD

Address

Floor 3, Building 3, No.6 xuzhuang Road, Xuanwu District, Nanjing nanjing CN 210000

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.