| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:1B:3 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:26:D | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:42:A | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:52:E | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:66:9 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:72:5 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:83:6 | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 00:50:C2:92:B | IAB | 4.1 thousand | GB | 30 Jul 2008 |
| 40:D8:55:08:6 | IAB | 4.1 thousand | GB | 20 Jan 2013 |
| 40:D8:55:12:9 | IAB | 4.1 thousand | GB | 30 Jun 2013 |
| 70:B3:D5:5E:4 | MA-S | 4.1 thousand | GB | 15 Aug 2014 |
| 70:B3:D5:C8:1 | MA-S | 4.1 thousand | GB | 16 Mar 2014 |
| 70:B3:D5:D4:2 | MA-S | 4.1 thousand | GB | 28 Jun 2015 |
Every block registered to DSP DESIGN in the IEEE registries, complete. Free-text search also matches former owners.