| Prefix | Block | Addresses | Country | First registered |
|---|---|---|---|---|
| 70:B3:D5:36:3 | MA-S | 4.1 thousand | US | 4 Feb 2018 |
| 70:B3:D5:39:2 | MA-S | 4.1 thousand | US | 10 Jan 2016 |
| 70:B3:D5:5D:2 | MA-S | 4.1 thousand | US | 8 Dec 2019 |
| 70:B3:D5:88:3 | MA-S | 4.1 thousand | US | 5 Sep 2020 |
| 70:B3:D5:8B:7 | MA-S | 4.1 thousand | US | 24 Dec 2017 |
| 70:B3:D5:91:4 | MA-S | 4.1 thousand | US | 31 Aug 2019 |
| 70:B3:D5:D1:0 | MA-S | 4.1 thousand | US | 9 Apr 2017 |
Every block registered to Contec Americas Inc. in the IEEE registries, complete. Free-text search also matches former owners.