Who owns MAC prefix 004091?

004091 is registered to PROCOMP INDUSTRIA ELETRONICA in the IEEE MA-L registry.

What devices use 004091?

Any network device with a MAC address starting 00:40:91 was manufactured by or for PROCOMP INDUSTRIA ELETRONICA.

MA-L · OUI prefix

PROCOMP INDUSTRIA ELETRONICA

Any MAC address starting 00:40:91 is registered to PROCOMP INDUSTRIA ELETRONICA in BR.

OUI prefix	004091
Vendor	PROCOMP INDUSTRIA ELETRONICA
Registry	MA-L (24-bit, large block)
Country	BR
Example MAC	00:40:91:00:00:00

What this means

The IEEE assigned the MA-L block 004091 to PROCOMP INDUSTRIA ELETRONICA. 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 00:40:91, it is PROCOMP INDUSTRIA ELETRONICA hardware.

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