What this means
The IEEE assigned the MA-L block 8C12C2 to GLBB Japan. 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 8C:12:C2, it is GLBB Japan hardware.
Frequently Asked Questions
Who owns MAC prefix 8C12C2?
8C12C2 is registered to GLBB Japan 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. GLBB Japan's block covers 16,777,216 addresses.
What devices use 8C12C2?
Any network device with a MAC address starting 8C:12:C2 was manufactured by or for GLBB Japan.