What this means
The IEEE assigned the MA-S block 70B3D53B7 to Paul Scherrer Institut (PSI). 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:D5:3B:7, it is Paul Scherrer Institut (PSI) hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D53B7?
70B3D53B7 is registered to Paul Scherrer Institut (PSI) 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. Paul Scherrer Institut (PSI)'s block covers 4,096 addresses.
What devices use 70B3D53B7?
Any network device with a MAC address starting 70:B3:D5:3B:7 was manufactured by or for Paul Scherrer Institut (PSI).