What this means
The IEEE assigned the MA-S block 70B3D5930 to The Institute of Mine Seismology. 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:D5:93:0, it is The Institute of Mine Seismology hardware.
Frequently Asked Questions
Who owns MAC prefix 70B3D5930?
70B3D5930 is registered to The Institute of Mine Seismology 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. The Institute of Mine Seismology's block covers 4,096 addresses.
What devices use 70B3D5930?
Any network device with a MAC address starting 70:B3:D5:93:0 was manufactured by or for The Institute of Mine Seismology.