Who owns MAC prefix 004000?

004000 is registered to PCI COMPONENTES DA AMZONIA LTD in the IEEE MA-L registry.

What devices use 004000?

Any network device with a MAC address starting 00:40:00 was manufactured by or for PCI COMPONENTES DA AMZONIA LTD.

MA-L · OUI prefix

PCI COMPONENTES DA AMZONIA LTD

Any MAC address starting 00:40:00 is registered to PCI COMPONENTES DA AMZONIA LTD in BR.

OUI prefix	004000
Vendor	PCI COMPONENTES DA AMZONIA LTD
Registry	MA-L (24-bit, large block)
Country	BR
Example MAC	00:40:00:00:00:00

What this means

The IEEE assigned the MA-L block 004000 to PCI COMPONENTES DA AMZONIA LTD. 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 00:40:00, it is PCI COMPONENTES DA AMZONIA LTD hardware.

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