What this means
The IEEE assigned the MA-L block C4CAD9 to Hangzhou H3C Technologies Co., Limited. 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:CA:D9, it is Hangzhou H3C Technologies Co., Limited hardware.
Frequently Asked Questions
Who owns MAC prefix C4CAD9?
C4CAD9 is registered to Hangzhou H3C Technologies Co., Limited 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. Hangzhou H3C Technologies Co., Limited's block covers 16,777,216 addresses.
What devices use C4CAD9?
Any network device with a MAC address starting C4:CA:D9 was manufactured by or for Hangzhou H3C Technologies Co., Limited.