| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| A0:67:BE | MA-L | 16.8 million | IT | 30 May 2013 |
| 00:50:C2:33:0 | IAB | 4.1 thousand | IT | 30 Jul 2008 |
| 00:50:C2:52:B | IAB | 4.1 thousand | IT | 30 Jul 2008 |
| 00:50:C2:60:D | IAB | 4.1 thousand | IT | 30 Jul 2008 |
| 00:50:C2:7E:9 | IAB | 4.1 thousand | IT | 30 Jul 2008 |
| 00:50:C2:95:6 | IAB | 4.1 thousand | IT | 30 Jul 2008 |
| 00:50:C2:A9:2 | IAB | 4.1 thousand | IT | 5 Apr 2009 |
| 00:50:C2:C3:A | IAB | 4.1 thousand | IT | 21 Mar 2010 |
| 00:50:C2:CE:2 | IAB | 4.1 thousand | IT | 1 Aug 2010 |
| 00:50:C2:D8:B | IAB | 4.1 thousand | IT | 5 Jan 2011 |
| 00:50:C2:E0:A | IAB | 4.1 thousand | IT | 24 Apr 2011 |
| 00:50:C2:F9:7 | IAB | 4.1 thousand | IT | 20 May 2012 |
| 40:D8:55:08:1 | IAB | 4.1 thousand | IT | 20 Jan 2013 |
| 40:D8:55:11:A | IAB | 4.1 thousand | IT | 16 Jun 2013 |
| 40:D8:55:17:1 | IAB | 4.1 thousand | IT | 15 Sep 2013 |
| 70:B3:D5:04:D | MA-S | 4.1 thousand | IT | 28 Jun 2015 |
| 70:B3:D5:14:5 | MA-S | 4.1 thousand | IT | 24 Dec 2017 |
| 70:B3:D5:30:C | MA-S | 4.1 thousand | IT | 6 Mar 2016 |
| 70:B3:D5:36:C | MA-S | 4.1 thousand | IT | 14 Sep 2014 |
| 70:B3:D5:3B:2 | MA-S | 4.1 thousand | IT | 3 Apr 2016 |
| 70:B3:D5:69:0 | MA-S | 4.1 thousand | IT | 4 Feb 2021 |
| 70:B3:D5:6C:8 | MA-S | 4.1 thousand | IT | 10 Sep 2020 |
| 70:B3:D5:7C:7 | MA-S | 4.1 thousand | IT | 10 Jun 2018 |
| 70:B3:D5:A3:5 | MA-S | 4.1 thousand | IT | 28 May 2017 |
| 70:B3:D5:BE:E | MA-S | 4.1 thousand | IT | 31 Jan 2019 |
| 70:B3:D5:C8:2 | MA-S | 4.1 thousand | IT | 12 Dec 2019 |
| 70:B3:D5:D3:7 | MA-S | 4.1 thousand | IT | 11 Dec 2016 |
| 70:B3:D5:D4:9 | MA-S | 4.1 thousand | IT | 4 Apr 2019 |
| 70:B3:D5:EA:F | MA-S | 4.1 thousand | IT | 16 May 2020 |
| 8C:1F:64:10:A | MA-S | 4.1 thousand | IT | 18 Mar 2025 |
| 8C:1F:64:11:6 | MA-S | 4.1 thousand | IT | 20 Apr 2024 |
| 8C:1F:64:18:7 | MA-S | 4.1 thousand | IT | 12 Oct 2022 |
| 8C:1F:64:19:3 | MA-S | 4.1 thousand | IT | 12 Jun 2021 |
| 8C:1F:64:1F:7 | MA-S | 4.1 thousand | IT | 5 Oct 2024 |
| 8C:1F:64:26:9 | MA-S | 4.1 thousand | IT | 29 Jul 2025 |
| 8C:1F:64:4C:F | MA-S | 4.1 thousand | IT | 18 Nov 2023 |
| 8C:1F:64:77:7 | MA-S | 4.1 thousand | IT | 11 Mar 2023 |
| 8C:1F:64:83:E | MA-S | 4.1 thousand | IT | 1 Jul 2022 |
| 8C:1F:64:90:7 | MA-S | 4.1 thousand | IT | 8 Feb 2023 |
| 8C:1F:64:B3:B | MA-S | 4.1 thousand | IT | 6 Mar 2022 |
| 8C:1F:64:CC:8 | MA-S | 4.1 thousand | IT | 3 Dec 2025 |
| 8C:1F:64:F3:3 | MA-S | 4.1 thousand | IT | 28 Jun 2023 |
Every block registered to Sicon srl in the IEEE registries, complete. Free-text search also matches former owners.