What this means
The IEEE assigned the MA-L block B4C476 to Wuhan Maritime Communication Research Institute. 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 B4:C4:76, it is Wuhan Maritime Communication Research Institute hardware.
Frequently Asked Questions
Who owns MAC prefix B4C476?
B4C476 is registered to Wuhan Maritime Communication Research Institute 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. Wuhan Maritime Communication Research Institute's block covers 16,777,216 addresses.
What devices use B4C476?
Any network device with a MAC address starting B4:C4:76 was manufactured by or for Wuhan Maritime Communication Research Institute.