What this means
The IEEE assigned the MA-L block 00A021 to General Dynamics Mission Systems. 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:A0:21, it is General Dynamics Mission Systems hardware.
Frequently Asked Questions
Who owns MAC prefix 00A021?
00A021 is registered to General Dynamics Mission Systems 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. General Dynamics Mission Systems's block covers 16,777,216 addresses.
What devices use 00A021?
Any network device with a MAC address starting 00:A0:21 was manufactured by or for General Dynamics Mission Systems.