| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:40:3 | IAB | 4.1 thousand | RO | 30 Jul 2008 |
| 00:50:C2:85:5 | IAB | 4.1 thousand | RO | 30 Jul 2008 |
| 00:50:C2:92:A | IAB | 4.1 thousand | RO | 30 Jul 2008 |
| 00:50:C2:9E:C | IAB | 4.1 thousand | RO | 30 Nov 2008 |
| 00:50:C2:BF:A | IAB | 4.1 thousand | RO | 31 Jan 2010 |
| 00:50:C2:C9:E | IAB | 4.1 thousand | RO | 23 May 2010 |
| 00:50:C2:D4:7 | IAB | 4.1 thousand | RO | 24 Oct 2010 |
| 00:50:C2:DD:3 | IAB | 4.1 thousand | RO | 27 Feb 2011 |
| 00:50:C2:E2:A | IAB | 4.1 thousand | RO | 7 Aug 2011 |
| 00:50:C2:E4:B | IAB | 4.1 thousand | RO | 7 Aug 2011 |
| 00:50:C2:EA:D | IAB | 4.1 thousand | RO | 2 Oct 2011 |
| 00:50:C2:EE:4 | IAB | 4.1 thousand | RO | 27 Nov 2011 |
| 00:50:C2:F5:2 | IAB | 4.1 thousand | RO | 18 Mar 2012 |
| 00:50:C2:FC:0 | IAB | 4.1 thousand | RO | 8 Jul 2012 |
| DC:44:27:D | MA-M | 1 million | RO | 16 Oct 2015 |
| 40:D8:55:06:C | IAB | 4.1 thousand | RO | 16 Dec 2012 |
| 40:D8:55:19:A | IAB | 4.1 thousand | RO | 27 Oct 2013 |
| 70:B3:D5:18:6 | MA-S | 4.1 thousand | RO | 5 Oct 2014 |
| 70:B3:D5:24:3 | MA-S | 4.1 thousand | RO | 15 Jun 2014 |
| 70:B3:D5:29:6 | MA-S | 4.1 thousand | RO | 23 Nov 2014 |
| 70:B3:D5:93:2 | MA-S | 4.1 thousand | RO | 8 Mar 2015 |
| 70:B3:D5:FB:0 | MA-S | 4.1 thousand | RO | 23 Feb 2014 |
Every block registered to Rohde&Schwarz Topex SA in the IEEE registries, complete. Free-text search also matches former owners.