What this means
The IEEE assigned the MA-L block 0012D0 to Gossen-Metrawatt-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 00:12:D0, it is Gossen-Metrawatt-GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 0012D0?
0012D0 is registered to Gossen-Metrawatt-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. Gossen-Metrawatt-GmbH's block covers 16,777,216 addresses.
What devices use 0012D0?
Any network device with a MAC address starting 00:12:D0 was manufactured by or for Gossen-Metrawatt-GmbH.