Who owns MAC prefix 84C3E8?

84C3E8 is registered to Vaillant GmbH in the IEEE MA-L registry.

What devices use 84C3E8?

Any network device with a MAC address starting 84:C3:E8 was manufactured by or for Vaillant GmbH.

MA-L · OUI prefix

Vaillant GmbH

Any MAC address starting 84:C3:E8 is registered to Vaillant GmbH in DE.

OUI prefix	84C3E8
Vendor	Vaillant GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	84:C3:E8:00:00:00

What this means

The IEEE assigned the MA-L block 84C3E8 to Vaillant 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 84:C3:E8, it is Vaillant GmbH hardware.

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