What this means
The IEEE assigned the MA-L block 00221A to Audio Precision. 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 00:22:1A, it is Audio Precision hardware.
Frequently Asked Questions
Who owns MAC prefix 00221A?
00221A is registered to Audio Precision 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. Audio Precision's block covers 16,777,216 addresses.
What devices use 00221A?
Any network device with a MAC address starting 00:22:1A was manufactured by or for Audio Precision.