What this means
The IEEE assigned the MA-L block 0CB912 to JM-DATA GmbH. 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 0C:B9:12, it is JM-DATA GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 0CB912?
0CB912 is registered to JM-DATA GmbH 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. JM-DATA GmbH's block covers 16,777,216 addresses.
What devices use 0CB912?
Any network device with a MAC address starting 0C:B9:12 was manufactured by or for JM-DATA GmbH.