What this means
The IEEE assigned the MA-L block 7C9F07 to CIG SHANGHAI 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:9F:07, it is CIG SHANGHAI CO LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 7C9F07?
7C9F07 is registered to CIG SHANGHAI 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. CIG SHANGHAI CO LTD's block covers 16,777,216 addresses.
What devices use 7C9F07?
Any network device with a MAC address starting 7C:9F:07 was manufactured by or for CIG SHANGHAI CO LTD.