What this means

The IEEE assigned the MA-M block F0221D1 to Dr. Eberl MBE Komponenten 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 F0:22:1D:1, it is Dr. Eberl MBE Komponenten GmbH hardware.