What this means
The IEEE assigned the MA-L block 1C129D to IEEE PES PSRC/SUB. 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 1C:12:9D, it is IEEE PES PSRC/SUB hardware.
Frequently Asked Questions
Who owns MAC prefix 1C129D?
1C129D is registered to IEEE PES PSRC/SUB 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. IEEE PES PSRC/SUB's block covers 16,777,216 addresses.
What devices use 1C129D?
Any network device with a MAC address starting 1C:12:9D was manufactured by or for IEEE PES PSRC/SUB.