Who owns MAC prefix 0021FF?

0021FF is registered to Cyfrowy Polsat SA in the IEEE MA-L registry.

What devices use 0021FF?

Any network device with a MAC address starting 00:21:FF was manufactured by or for Cyfrowy Polsat SA.

MA-L · OUI prefix

Cyfrowy Polsat SA

Any MAC address starting 00:21:FF is registered to Cyfrowy Polsat SA in PL.

OUI prefix	0021FF
Vendor	Cyfrowy Polsat SA
Registry	MA-L (24-bit, large block)
Country	PL
Example MAC	00:21:FF:00:00:00

What this means

The IEEE assigned the MA-L block 0021FF to Cyfrowy Polsat SA. 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:FF, it is Cyfrowy Polsat SA hardware.

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