JiangSu Joyque Information Industry Co.,Ltd

Any device whose MAC address begins with C4:D4:89 has a network interface built by JiangSu Joyque Information Industry 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

C4:D4:89

Organization

JiangSu Joyque Information Industry Co.,Ltd

Address

10 Floor YaHua Building, Xi'anBei Road, Xuzhou JiangSu CN 221006

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.