Who owns MAC prefix 001946?

001946 is registered to Cianet Industria e Comercio S/A in the IEEE MA-L registry.

What devices use 001946?

Any network device with a MAC address starting 00:19:46 was manufactured by or for Cianet Industria e Comercio S/A.

MA-L · OUI prefix

Cianet Industria e Comercio S/A

Any MAC address starting 00:19:46 is registered to Cianet Industria e Comercio S/A in BR.

OUI prefix	001946
Vendor	Cianet Industria e Comercio S/A
Registry	MA-L (24-bit, large block)
Country	BR
Example MAC	00:19:46:00:00:00

What this means

The IEEE assigned the MA-L block 001946 to Cianet Industria e Comercio S/A. 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 00:19:46, it is Cianet Industria e Comercio S/A hardware.

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