What this means

The IEEE assigned the MA-S block 70B3D5CB9 to JSC «SATIS-TL-94». 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 70:B3:D5:CB:9, it is JSC «SATIS-TL-94» hardware.