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.
Frequently Asked Questions
Who owns MAC prefix B01F81A?
B01F81A is registered to Steffens Systems GmbH in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Steffens Systems GmbH's block covers 1,048,576 addresses.
What devices use B01F81A?
Any network device with a MAC address starting B0:1F:81:A was manufactured by or for Steffens Systems GmbH.