Who owns MAC prefix 0021C1?

0021C1 is registered to ABB Oy / Medium Voltage Products in the IEEE MA-L registry.

What devices use 0021C1?

Any network device with a MAC address starting 00:21:C1 was manufactured by or for ABB Oy / Medium Voltage Products.

MA-L · OUI prefix

ABB Oy / Medium Voltage Products

Any MAC address starting 00:21:C1 is registered to ABB Oy / Medium Voltage Products in FI.

OUI prefix	0021C1
Vendor	ABB Oy / Medium Voltage Products
Registry	MA-L (24-bit, large block)
Country	FI
Example MAC	00:21:C1:00:00:00

What this means

The IEEE assigned the MA-L block 0021C1 to ABB Oy / Medium Voltage Products. 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:C1, it is ABB Oy / Medium Voltage Products hardware.

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