| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:04:A3 | MA-L | 16.8 million | US | 4 Dec 2000 |
| 00:1E:C0 | MA-L | 16.8 million | US | 20 Nov 2007 |
| 04:91:62 | MA-L | 16.8 million | US | 29 Jun 2018 |
| 0C:02:5B | MA-L | 16.8 million | US | 8 Apr 2026 |
| 40:84:32 | MA-L | 16.8 million | US | 31 Mar 2023 |
| 44:B7:D0 | MA-L | 16.8 million | US | 4 Aug 2022 |
| 54:10:EC | MA-L | 16.8 million | US | 5 Apr 2016 |
| 60:8A:10 | MA-L | 16.8 million | US | 30 Mar 2021 |
| 68:27:19 | MA-L | 16.8 million | US | 17 Jul 2019 |
| 80:1F:12 | MA-L | 16.8 million | US | 20 Oct 2017 |
| 80:34:28 | MA-L | 16.8 million | US | 23 Dec 2020 |
| 9C:95:6E | MA-L | 16.8 million | US | 22 Apr 2022 |
| D8:47:8F | MA-L | 16.8 million | US | 14 Jan 2023 |
| D8:80:39 | MA-L | 16.8 million | US | 31 Jul 2014 |
| E8:EB:1B | MA-L | 16.8 million | US | 24 Jun 2020 |
| FC:0F:E7 | MA-L | 16.8 million | US | 11 Sep 2021 |
Every block registered to Microchip Technology Inc. in the IEEE registries, complete. Free-text search also matches former owners.