What this means
The IEEE assigned the MA-L block 002123 to Aerosat Avionics. 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 00:21:23, it is Aerosat Avionics hardware.
Frequently Asked Questions
Who owns MAC prefix 002123?
002123 is registered to Aerosat Avionics 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. Aerosat Avionics's block covers 16,777,216 addresses.
What devices use 002123?
Any network device with a MAC address starting 00:21:23 was manufactured by or for Aerosat Avionics.