What this means
The IEEE assigned the MA-L block 00021B to Kollmorgen-Servotronix. 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 00:02:1B, it is Kollmorgen-Servotronix hardware.
Frequently Asked Questions
Who owns MAC prefix 00021B?
00021B is registered to Kollmorgen-Servotronix 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. Kollmorgen-Servotronix's block covers 16,777,216 addresses.
What devices use 00021B?
Any network device with a MAC address starting 00:02:1B was manufactured by or for Kollmorgen-Servotronix.