Microsoft MAC address blocks
The IEEE registry carries 10 blocks registered to Microsoft, together 151 million addresses, first observed 30 Jul 2008, most recently 15 Aug 2015.
Registered in US.
Cumulative address space by first-observed date on a linear scale sized to this chart; hover for date and total.
| Prefix |
Block |
Addresses |
Country |
First registered |
| 30:59:B7 | MA-L | 16.8 million | US | 25 Jan 2014 |
| 4C:0B:BE | MA-L | 16.8 million | US | 1 Aug 2014 |
| 50:1A:C5 | MA-L | 16.8 million | US | 25 Sep 2013 |
| 58:82:A8 | MA-L | 16.8 million | US | 15 Aug 2015 |
| 60:45:BD | MA-L | 16.8 million | US | 19 Apr 2012 |
| 7C:1E:52 | MA-L | 16.8 million | US | 18 Jun 2011 |
| 7C:ED:8D | MA-L | 16.8 million | US | 2 Jun 2010 |
| B4:AE:2B | MA-L | 16.8 million | US | 24 Apr 2015 |
| C0:33:5E | MA-L | 16.8 million | US | 6 Nov 2014 |
| 00:50:C2:00:3 | IAB | 4.1 thousand | US | 30 Jul 2008 |
Every block registered to Microsoft in the IEEE registries, complete. Free-text search also matches former owners.
Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.