What this means
The IEEE assigned the MA-L block 7C03C9 to Shenzhen YOUHUA Technology 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 7C:03:C9, it is Shenzhen YOUHUA Technology Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 7C03C9?
7C03C9 is registered to Shenzhen YOUHUA Technology 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. Shenzhen YOUHUA Technology Co., Ltd's block covers 16,777,216 addresses.
What devices use 7C03C9?
Any network device with a MAC address starting 7C:03:C9 was manufactured by or for Shenzhen YOUHUA Technology Co., Ltd.