Who owns MAC prefix 18204C?

18204C is registered to Kummler+Matter AG in the IEEE MA-L registry.

What devices use 18204C?

Any network device with a MAC address starting 18:20:4C was manufactured by or for Kummler+Matter AG.

MA-L · OUI prefix

Kummler+Matter AG

Any MAC address starting 18:20:4C is registered to Kummler+Matter AG in CH.

OUI prefix	18204C
Vendor	Kummler+Matter AG
Registry	MA-L (24-bit, large block)
Country	CH
Example MAC	18:20:4C:00:00:00

What this means

The IEEE assigned the MA-L block 18204C to Kummler+Matter AG. 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 18:20:4C, it is Kummler+Matter AG hardware.

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