Who owns MAC prefix 54F666?

54F666 is registered to Berthold Technologies GmbH and Co.KG in the IEEE MA-L registry.

What devices use 54F666?

Any network device with a MAC address starting 54:F6:66 was manufactured by or for Berthold Technologies GmbH and Co.KG.

MA-L · OUI prefix

Berthold Technologies GmbH and Co.KG

Any MAC address starting 54:F6:66 is registered to Berthold Technologies GmbH and Co.KG in DE.

OUI prefix	54F666
Vendor	Berthold Technologies GmbH and Co.KG
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	54:F6:66:00:00:00

What this means

The IEEE assigned the MA-L block 54F666 to Berthold Technologies GmbH and Co.KG. 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 54:F6:66, it is Berthold Technologies GmbH and Co.KG hardware.

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