| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:C6:3 | IAB | 4.1 thousand | US | 11 Apr 2010 |
| 00:50:C2:DF:4 | IAB | 4.1 thousand | US | 3 Apr 2011 |
| 70:B3:D5:1B:E | MA-S | 4.1 thousand | US | 4 Mar 2018 |
| 70:B3:D5:26:1 | MA-S | 4.1 thousand | US | 29 Nov 2015 |
| 70:B3:D5:6D:5 | MA-S | 4.1 thousand | US | 5 Jan 2021 |
| 70:B3:D5:70:C | MA-S | 4.1 thousand | US | 29 Apr 2020 |
| 70:B3:D5:7A:4 | MA-S | 4.1 thousand | US | 17 Jul 2016 |
| 70:B3:D5:83:2 | MA-S | 4.1 thousand | US | 23 May 2019 |
| 70:B3:D5:A1:B | MA-S | 4.1 thousand | US | 14 Dec 2014 |
| 70:B3:D5:B9:A | MA-S | 4.1 thousand | US | 19 Aug 2018 |
| 70:B3:D5:BE:B | MA-S | 4.1 thousand | US | 10 Sep 2020 |
| 70:B3:D5:C1:7 | MA-S | 4.1 thousand | US | 2 Apr 2017 |
| 70:B3:D5:F5:D | MA-S | 4.1 thousand | US | 21 Nov 2019 |
| 8C:1F:64:07:3 | MA-S | 4.1 thousand | US | 7 Sep 2024 |
| 8C:1F:64:14:B | MA-S | 4.1 thousand | US | 16 Jun 2022 |
| 8C:1F:64:1E:2 | MA-S | 4.1 thousand | US | 12 Sep 2023 |
| 8C:1F:64:31:6 | MA-S | 4.1 thousand | US | 29 Mar 2022 |
| 8C:1F:64:44:2 | MA-S | 4.1 thousand | US | 21 May 2024 |
| 8C:1F:64:4A:4 | MA-S | 4.1 thousand | US | 19 Jul 2025 |
| 8C:1F:64:4A:7 | MA-S | 4.1 thousand | US | 20 Apr 2024 |
| 8C:1F:64:57:B | MA-S | 4.1 thousand | US | 2 Oct 2021 |
| 8C:1F:64:68:4 | MA-S | 4.1 thousand | US | 3 Jan 2026 |
| 8C:1F:64:69:0 | MA-S | 4.1 thousand | US | 21 Aug 2025 |
| 8C:1F:64:6A:D | MA-S | 4.1 thousand | US | 19 Aug 2021 |
| 8C:1F:64:6C:E | MA-S | 4.1 thousand | US | 20 Mar 2025 |
| 8C:1F:64:75:D | MA-S | 4.1 thousand | US | 5 Feb 2026 |
| 8C:1F:64:7A:0 | MA-S | 4.1 thousand | US | 7 Mar 2024 |
| 8C:1F:64:7A:5 | MA-S | 4.1 thousand | US | 10 Jul 2024 |
| 8C:1F:64:81:B | MA-S | 4.1 thousand | US | 25 Jun 2025 |
| 8C:1F:64:84:2 | MA-S | 4.1 thousand | US | 27 Sep 2022 |
| 8C:1F:64:89:F | MA-S | 4.1 thousand | US | 28 May 2026 |
| 8C:1F:64:8C:8 | MA-S | 4.1 thousand | US | 7 Oct 2025 |
| 8C:1F:64:8F:E | MA-S | 4.1 thousand | US | 9 Aug 2024 |
| 8C:1F:64:91:B | MA-S | 4.1 thousand | US | 6 May 2023 |
| 8C:1F:64:96:5 | MA-S | 4.1 thousand | US | 13 Feb 2025 |
| 8C:1F:64:97:0 | MA-S | 4.1 thousand | US | 31 Oct 2023 |
| 8C:1F:64:9A:D | MA-S | 4.1 thousand | US | 3 Dec 2025 |
| 8C:1F:64:A3:4 | MA-S | 4.1 thousand | US | 15 Mar 2023 |
| 8C:1F:64:C8:5 | MA-S | 4.1 thousand | US | 22 Jan 2023 |
| 8C:1F:64:CC:5 | MA-S | 4.1 thousand | US | 23 Nov 2022 |
| 8C:1F:64:CE:0 | MA-S | 4.1 thousand | US | 18 Apr 2025 |
| 8C:1F:64:D6:0 | MA-S | 4.1 thousand | US | 5 Dec 2023 |
| 8C:1F:64:D6:4 | MA-S | 4.1 thousand | US | 3 Jan 2025 |
| 8C:1F:64:D8:E | MA-S | 4.1 thousand | US | 30 Jun 2023 |
| 8C:1F:64:EB:B | MA-S | 4.1 thousand | US | 17 May 2025 |
| 8C:1F:64:FD:F | MA-S | 4.1 thousand | US | 12 Nov 2024 |
| 8C:1F:64:FE:0 | MA-S | 4.1 thousand | US | 19 May 2021 |
Every block registered to Potter Electric Signal Co. LLC in the IEEE registries, complete. Free-text search also matches former owners.