What this means
The IEEE assigned the MA-L block F8A2B4 to RHEWA-WAAGENFABRIK August Freudewald GmbH &Co. KG. 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 F8:A2:B4, it is RHEWA-WAAGENFABRIK August Freudewald GmbH &Co. KG hardware.