What this means
The IEEE assigned the MA-M block D02212B to Schleifenbauer Holding BV. 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 D0:22:12:B, it is Schleifenbauer Holding BV hardware.
Frequently Asked Questions
Who owns MAC prefix D02212B?
D02212B is registered to Schleifenbauer Holding BV 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. Schleifenbauer Holding BV's block covers 1,048,576 addresses.
What devices use D02212B?
Any network device with a MAC address starting D0:22:12:B was manufactured by or for Schleifenbauer Holding BV.