Who owns MAC prefix 00210F?

00210F is registered to Cernium Corp in the IEEE MA-L registry.

What devices use 00210F?

Any network device with a MAC address starting 00:21:0F was manufactured by or for Cernium Corp.

MA-L · OUI prefix

Cernium Corp

Any MAC address starting 00:21:0F is registered to Cernium Corp in US.

OUI prefix	00210F
Vendor	Cernium Corp
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:21:0F:00:00:00

What this means

The IEEE assigned the MA-L block 00210F to Cernium Corp. 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 00:21:0F, it is Cernium Corp hardware.

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