| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 00:50:C2:99:E | IAB | 4.1 thousand | US | 8 Oct 2008 |
| 40:D8:55:14:9 | IAB | 4.1 thousand | US | 4 Aug 2013 |
| 70:B3:D5:20:D | MA-S | 4.1 thousand | US | 13 Nov 2016 |
| 70:B3:D5:97:7 | MA-S | 4.1 thousand | US | 22 Jul 2018 |
| 70:B3:D5:E1:1 | MA-S | 4.1 thousand | US | 21 Jul 2020 |
| 70:B3:D5:FC:D | MA-S | 4.1 thousand | US | 3 May 2015 |
| 8C:1F:64:07:7 | MA-S | 4.1 thousand | US | 7 Dec 2021 |
| 8C:1F:64:1A:0 | MA-S | 4.1 thousand | US | 6 Apr 2023 |
| 8C:1F:64:F1:E | MA-S | 4.1 thousand | US | 17 Dec 2025 |
Every block registered to Engage Technologies in the IEEE registries, complete. Free-text search also matches former owners.