What this means
The IEEE assigned the MA-L block C477AF to Advanced Digital Broadcast SA. 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 C4:77:AF, it is Advanced Digital Broadcast SA hardware.
Frequently Asked Questions
Who owns MAC prefix C477AF?
C477AF is registered to Advanced Digital Broadcast SA 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. Advanced Digital Broadcast SA's block covers 16,777,216 addresses.
What devices use C477AF?
Any network device with a MAC address starting C4:77:AF was manufactured by or for Advanced Digital Broadcast SA.