Who owns MAC prefix B01F81A?

B01F81A is registered to Steffens Systems GmbH in the IEEE MA-M registry.

What devices use B01F81A?

Any network device with a MAC address starting B0:1F:81:A was manufactured by or for Steffens Systems GmbH.

MA-M · OUI prefix

Steffens Systems GmbH

Any MAC address starting B0:1F:81:A is registered to Steffens Systems GmbH in DE.

OUI prefix	B01F81A
Vendor	Steffens Systems GmbH
Registry	MA-M (28-bit, medium block)
Country	DE
Example MAC	B0:1F:81:A:00:00:00

What this means

The IEEE assigned the MA-M block B01F81A to Steffens Systems 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 B0:1F:81:A, it is Steffens Systems GmbH hardware.

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