Who owns MAC prefix 804B20?

804B20 is registered to Ventilation Control in the IEEE MA-L registry.

What devices use 804B20?

Any network device with a MAC address starting 80:4B:20 was manufactured by or for Ventilation Control.

MA-L · OUI prefix

Ventilation Control

Any MAC address starting 80:4B:20 is registered to Ventilation Control in DE.

OUI prefix	804B20
Vendor	Ventilation Control
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	80:4B:20:00:00:00

What this means

The IEEE assigned the MA-L block 804B20 to Ventilation Control. 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 80:4B:20, it is Ventilation Control hardware.

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