What this means
The IEEE assigned the MA-L block 00012F to Twinhead International Corp. 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 00:01:2F, it is Twinhead International Corp hardware.
Frequently Asked Questions
Who owns MAC prefix 00012F?
00012F is registered to Twinhead International Corp 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. Twinhead International Corp's block covers 16,777,216 addresses.
What devices use 00012F?
Any network device with a MAC address starting 00:01:2F was manufactured by or for Twinhead International Corp.