What this means
The IEEE assigned the MA-L block 002071 to IBR 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 00:20:71, it is IBR GMBH hardware.
Frequently Asked Questions
Who owns MAC prefix 002071?
002071 is registered to IBR 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. IBR GMBH's block covers 16,777,216 addresses.
What devices use 002071?
Any network device with a MAC address starting 00:20:71 was manufactured by or for IBR GMBH.