Who owns MAC prefix D85DEF?

D85DEF is registered to Busch-Jaeger Elektro GmbH in the IEEE MA-L registry.

What devices use D85DEF?

Any network device with a MAC address starting D8:5D:EF was manufactured by or for Busch-Jaeger Elektro GmbH.

MA-L · OUI prefix

Busch-Jaeger Elektro GmbH

Any MAC address starting D8:5D:EF is registered to Busch-Jaeger Elektro GmbH in DE.

OUI prefix	D85DEF
Vendor	Busch-Jaeger Elektro GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	D8:5D:EF:00:00:00

What this means

The IEEE assigned the MA-L block D85DEF to Busch-Jaeger Elektro 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 D8:5D:EF, it is Busch-Jaeger Elektro GmbH hardware.

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