Who owns MAC prefix C40F09?

C40F09 is registered to Hermes electronic GmbH in the IEEE MA-L registry.

What devices use C40F09?

Any network device with a MAC address starting C4:0F:09 was manufactured by or for Hermes electronic GmbH.

MA-L · OUI prefix

Hermes electronic GmbH

Any MAC address starting C4:0F:09 is registered to Hermes electronic GmbH in DE.

OUI prefix	C40F09
Vendor	Hermes electronic GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	C4:0F:09:00:00:00

What this means

The IEEE assigned the MA-L block C40F09 to Hermes electronic GmbH. 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 C4:0F:09, it is Hermes electronic GmbH hardware.

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