| Organization | Blocks | Addresses | First registered |
|---|---|---|---|
| Artec Design | 2 | 16.8 million | 13 Jun 2006 |
| Forecr OU | 1 | 16.8 million | 7 Mar 2025 |
| ISIF | 1 | 16.8 million | 3 Sep 2025 |
| Yoga | 1 | 16.8 million | 16 Apr 2010 |
| NORDI TELEKOMMUNIKATSIOONI OÜ | 2 | 2.1 million | 4 Oct 2018 |
| Hardmeier | 2 | 1.1 million | 30 Jul 2008 |
| Digiport OU | 1 | 1 million | 20 May 2021 |
| Incogniteam Ltd. | 1 | 1 million | 16 Oct 2015 |
| Larva.io OÜ | 1 | 1 million | 25 Oct 2020 |
| Martem AS | 1 | 1 million | 16 Oct 2015 |
| Ridango AS | 1 | 1 million | 14 Jan 2018 |
| Wayren OÜ | 1 | 1 million | 20 Mar 2025 |
| AIROBOT OÜ | 1 | 4.1 thousand | 25 Dec 2016 |
| Cityntel OU | 1 | 4.1 thousand | 1 Feb 2015 |
| FoxIoT OÜ | 1 | 4.1 thousand | 1 Sep 2022 |
| OBSERVER FOUNDATION | 1 | 4.1 thousand | 5 Jan 2019 |
| OÜ ELIKO Tehnoloogia Arenduskeskus | 1 | 4.1 thousand | 14 Jan 2018 |
| Top Connect OU | 1 | 4.1 thousand | 21 Apr 2013 |
Every organization with blocks registered in Estonia, sorted by total address space.