Who owns MAC prefix 0021AD?

0021AD is registered to Nordic ID Oy in the IEEE MA-L registry.

What devices use 0021AD?

Any network device with a MAC address starting 00:21:AD was manufactured by or for Nordic ID Oy.

MA-L · OUI prefix

Nordic ID Oy

Any MAC address starting 00:21:AD is registered to Nordic ID Oy in FI.

OUI prefix	0021AD
Vendor	Nordic ID Oy
Registry	MA-L (24-bit, large block)
Country	FI
Example MAC	00:21:AD:00:00:00

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.

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