| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:01:30 | MA-L | 16.8 million | US | 8 Sep 2000 |
| 00:04:96 | MA-L | 16.8 million | US | 4 Dec 2000 |
| 00:19:77 | MA-L | 16.8 million | US | 27 Aug 2006 |
| 00:89:C9 | MA-L | 16.8 million | US | 15 Nov 2025 |
| 00:B8:1D | MA-L | 16.8 million | US | 14 Jan 2026 |
| 00:DC:B2 | MA-L | 16.8 million | US | 14 Nov 2020 |
| 00:E0:2B | MA-L | 16.8 million | US | 22 Apr 1998 |
| 00:E6:0E | MA-L | 16.8 million | US | 19 Jan 2023 |
| 08:EA:44 | MA-L | 16.8 million | US | 22 Nov 2011 |
| 0C:9B:78 | MA-L | 16.8 million | US | 13 Jul 2023 |
| 0C:ED:71 | MA-L | 16.8 million | US | 14 Nov 2024 |
| 14:BA:A2 | MA-L | 16.8 million | US | 8 Sep 2026 |
| 18:49:F8 | MA-L | 16.8 million | US | 15 Jul 2023 |
| 1C:2D:60 | MA-L | 16.8 million | US | 23 Mar 2026 |
| 1C:98:4B | MA-L | 16.8 million | US | 3 Oct 2025 |
| 20:6C:8A | MA-L | 16.8 million | US | 4 Aug 2016 |
| 20:9E:F7 | MA-L | 16.8 million | US | 26 Dec 2019 |
| 24:1F:BD | MA-L | 16.8 million | US | 27 Feb 2022 |
| 24:81:85 | MA-L | 16.8 million | US | 15 Dec 2025 |
| 30:F8:56 | MA-L | 16.8 million | US | 12 Jun 2025 |
| 34:85:84 | MA-L | 16.8 million | US | 2 Aug 2017 |
| 40:18:B1 | MA-L | 16.8 million | US | 25 Jan 2012 |
| 40:3F:43 | MA-L | 16.8 million | US | 4 Mar 2025 |
| 40:88:2F | MA-L | 16.8 million | US | 9 Apr 2020 |
| 40:B2:15 | MA-L | 16.8 million | US | 3 Aug 2024 |
| 40:E3:17 | MA-L | 16.8 million | US | 22 Jun 2023 |
| 40:E7:67 | MA-L | 16.8 million | US | 8 Sep 2026 |
| 44:2D:49 | MA-L | 16.8 million | US | 22 Jul 2026 |
| 44:E4:E6 | MA-L | 16.8 million | US | 20 Oct 2023 |
| 48:9B:D5 | MA-L | 16.8 million | US | 13 Apr 2019 |
| 4C:0A:4E | MA-L | 16.8 million | US | 17 Apr 2025 |
| 4C:23:1A | MA-L | 16.8 million | US | 25 Dec 2022 |
| 50:0A:9C | MA-L | 16.8 million | US | 19 Sep 2024 |
| 58:58:CD | MA-L | 16.8 million | US | 15 Sep 2022 |
| 58:59:C2 | MA-L | 16.8 million | US | 10 Jul 2019 |
| 5C:0E:8B | MA-L | 16.8 million | US | 26 Feb 2010 |
| 60:1D:56 | MA-L | 16.8 million | US | 23 Nov 2023 |
| 60:2D:74 | MA-L | 16.8 million | US | 3 Aug 2024 |
| 64:CB:A0 | MA-L | 16.8 million | US | 1 Oct 2026 |
| 6C:03:70 | MA-L | 16.8 million | US | 29 Dec 2022 |
| 74:67:F7 | MA-L | 16.8 million | US | 11 Jul 2015 |
| 78:7D:53 | MA-L | 16.8 million | US | 23 Jun 2018 |
| 78:96:A3 | MA-L | 16.8 million | US | 16 Sep 2022 |
| 7C:95:B1 | MA-L | 16.8 million | US | 4 Aug 2016 |
| 7C:A4:F7 | MA-L | 16.8 million | US | 17 Apr 2025 |
| 80:95:62 | MA-L | 16.8 million | US | 14 Apr 2023 |
| 88:5B:DD | MA-L | 16.8 million | US | 24 Jan 2014 |
| 88:7E:25 | MA-L | 16.8 million | US | 20 Jun 2019 |
| 8C:49:7A | MA-L | 16.8 million | US | 21 Oct 2021 |
| 90:B8:32 | MA-L | 16.8 million | US | 10 Jul 2019 |
| 94:9B:2C | MA-L | 16.8 million | US | 23 May 2018 |
| 9C:5D:12 | MA-L | 16.8 million | US | 2 Jun 2012 |
| 9C:DC:99 | MA-L | 16.8 million | US | 22 Jul 2026 |
| A4:73:AB | MA-L | 16.8 million | US | 14 Jul 2023 |
| A4:97:91 | MA-L | 16.8 million | US | 4 Mar 2025 |
| A4:C7:F6 | MA-L | 16.8 million | US | 16 Oct 2022 |
| A4:EA:8E | MA-L | 16.8 million | US | 9 Mar 2018 |
| A8:C6:47 | MA-L | 16.8 million | US | 2 Feb 2023 |
| AC:4D:D9 | MA-L | 16.8 million | US | 21 Mar 2023 |
| AC:7F:8D | MA-L | 16.8 million | US | 21 Dec 2023 |
| AC:ED:32 | MA-L | 16.8 million | US | 5 Apr 2023 |
| B0:27:CF | MA-L | 16.8 million | US | 28 Feb 2021 |
| B4:2D:56 | MA-L | 16.8 million | US | 16 Sep 2017 |
| B4:A3:BD | MA-L | 16.8 million | US | 23 Nov 2023 |
| B4:C7:99 | MA-L | 16.8 million | US | 15 Apr 2011 |
| B8:1E:0B | MA-L | 16.8 million | US | 14 Jan 2026 |
| B8:50:01 | MA-L | 16.8 million | US | 16 Aug 2016 |
| B8:7C:F2 | MA-L | 16.8 million | US | 24 Jan 2014 |
| B8:DC:28 | MA-L | 16.8 million | US | 23 Mar 2026 |
| BC:34:D6 | MA-L | 16.8 million | US | 11 Aug 2025 |
| BC:F3:10 | MA-L | 16.8 million | US | 23 Jun 2018 |
| C4:13:E2 | MA-L | 16.8 million | US | 14 Jan 2015 |
| C8:51:FB | MA-L | 16.8 million | US | 15 Apr 2023 |
| C8:66:5D | MA-L | 16.8 million | US | 17 Sep 2015 |
| C8:67:5E | MA-L | 16.8 million | US | 17 Sep 2015 |
| C8:BE:35 | MA-L | 16.8 million | US | 12 Jan 2022 |
| D8:02:C0 | MA-L | 16.8 million | US | 20 Oct 2023 |
| D8:54:A2 | MA-L | 16.8 million | US | 14 Jan 2015 |
| D8:84:66 | MA-L | 16.8 million | US | 12 Aug 2014 |
| D8:E0:16 | MA-L | 16.8 million | US | 11 Aug 2025 |
| DC:23:3B | MA-L | 16.8 million | US | 5 Apr 2023 |
| DC:39:FD | MA-L | 16.8 million | US | 1 Oct 2026 |
| DC:B8:08 | MA-L | 16.8 million | US | 10 Jan 2019 |
| DC:BB:3D | MA-L | 16.8 million | US | 12 Jun 2025 |
| DC:DC:C3 | MA-L | 16.8 million | US | 24 Jun 2022 |
| DC:E6:50 | MA-L | 16.8 million | US | 17 May 2022 |
| E0:1C:41 | MA-L | 16.8 million | US | 25 Jan 2012 |
| E0:A1:29 | MA-L | 16.8 million | US | 8 Mar 2023 |
| E4:16:13 | MA-L | 16.8 million | US | 3 Oct 2025 |
| E4:44:E5 | MA-L | 16.8 million | US | 21 Jul 2021 |
| E4:DB:AE | MA-L | 16.8 million | US | 20 Sep 2022 |
| E4:FD:8C | MA-L | 16.8 million | US | 14 Nov 2024 |
| F0:2B:7C | MA-L | 16.8 million | US | 15 Jul 2023 |
| F0:64:26 | MA-L | 16.8 million | US | 23 Aug 2020 |
| F0:9C:E9 | MA-L | 16.8 million | US | 2 Jun 2012 |
| F4:54:24 | MA-L | 16.8 million | US | 15 Jul 2023 |
| F4:6E:95 | MA-L | 16.8 million | US | 23 Sep 2018 |
| F4:CE:48 | MA-L | 16.8 million | US | 21 May 2021 |
| F4:EA:B5 | MA-L | 16.8 million | US | 2 Aug 2017 |
| FC:0A:81 | MA-L | 16.8 million | US | 17 Nov 2011 |
Every block registered to Extreme Networks, Inc. in the IEEE registries, complete. Free-text search also matches former owners.