What this means
The IEEE assigned the MA-L block 0021AD to Nordic ID Oy. 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:AD, it is Nordic ID Oy hardware.
Frequently Asked Questions
Who owns MAC prefix 0021AD?
0021AD is registered to Nordic ID Oy 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. Nordic ID Oy's block covers 16,777,216 addresses.
What devices use 0021AD?
Any network device with a MAC address starting 00:21:AD was manufactured by or for Nordic ID Oy.