Who owns MAC prefix 8C1F64656?

8C1F64656 is registered to Optotune Switzerland AG in the IEEE MA-S registry.

What devices use 8C1F64656?

Any network device with a MAC address starting 8C:1F:64:65:6 was manufactured by or for Optotune Switzerland AG.

MA-S · OUI prefix

Optotune Switzerland AG

Any MAC address starting 8C:1F:64:65:6 is registered to Optotune Switzerland AG in CH.

OUI prefix	8C1F64656
Vendor	Optotune Switzerland AG
Registry	MA-S (36-bit, small block)
Country	CH
Example MAC	8C:1F:64:65:6:00:00:00

What this means

The IEEE assigned the MA-S block 8C1F64656 to Optotune Switzerland 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 8C:1F:64:65:6, it is Optotune Switzerland AG hardware.

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