What this means
The IEEE assigned the MA-L block C4D489 to JiangSu Joyque Information Industry Co.,Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting C4:D4:89, it is JiangSu Joyque Information Industry Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix C4D489?
C4D489 is registered to JiangSu Joyque Information Industry Co.,Ltd in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. JiangSu Joyque Information Industry Co.,Ltd's block covers 16,777,216 addresses.
What devices use C4D489?
Any network device with a MAC address starting C4:D4:89 was manufactured by or for JiangSu Joyque Information Industry Co.,Ltd.