What this means
The IEEE assigned the MA-S block 70B3D5A7D to Prior Scientific Instruments Ltd. 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:A7:D, it is Prior Scientific Instruments Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5A7D?
70B3D5A7D is registered to Prior Scientific Instruments Ltd in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Prior Scientific Instruments Ltd's block covers 4,096 addresses.
What devices use 70B3D5A7D?
Any network device with a MAC address starting 70:B3:D5:A7:D was manufactured by or for Prior Scientific Instruments Ltd.