Who owns MAC prefix B4E85C?

B4E85C is registered to fünfeinhalb Funksysteme GmbH in the IEEE MA-L registry.

What devices use B4E85C?

Any network device with a MAC address starting B4:E8:5C was manufactured by or for fünfeinhalb Funksysteme GmbH.

MA-L · OUI prefix

fünfeinhalb Funksysteme GmbH

Any MAC address starting B4:E8:5C is registered to fünfeinhalb Funksysteme GmbH in DE.

OUI prefix	B4E85C
Vendor	fünfeinhalb Funksysteme GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	B4:E8:5C:00:00:00

What this means

The IEEE assigned the MA-L block B4E85C to fünfeinhalb Funksysteme 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 B4:E8:5C, it is fünfeinhalb Funksysteme GmbH hardware.

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