| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:01:6 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:11:6 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:A7:4 | IAB | 4.1 thousand | GB | 8 Mar 2009 |
| 00:50:C2:BA:3 | IAB | 4.1 thousand | GB | 29 Nov 2009 |
| 00:50:C2:CA:A | IAB | 4.1 thousand | GB | 6 Jun 2010 |
| 00:50:C2:DB:5 | IAB | 4.1 thousand | GB | 30 Jan 2011 |
| 00:50:C2:E9:1 | IAB | 4.1 thousand | GB | 5 Sep 2011 |
| 00:50:C2:F5:C | IAB | 4.1 thousand | GB | 25 Mar 2012 |
| 70:B3:D5:20:8 | MA-S | 4.1 thousand | GB | 1 Feb 2015 |
Every block registered to DSP DESIGN LTD in the IEEE registries, complete. Free-text search also matches former owners.