Who owns MAC prefix 0021C4?

0021C4 is registered to Consilium AB in the IEEE MA-L registry.

What devices use 0021C4?

Any network device with a MAC address starting 00:21:C4 was manufactured by or for Consilium AB.

MA-L · OUI prefix

Consilium AB

Any MAC address starting 00:21:C4 is registered to Consilium AB in SE.

OUI prefix	0021C4
Vendor	Consilium AB
Registry	MA-L (24-bit, large block)
Country	SE
Example MAC	00:21:C4:00:00:00

What this means

The IEEE assigned the MA-L block 0021C4 to Consilium AB. 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:C4, it is Consilium AB hardware.

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