| Organization | Blocks | Addresses | First registered |
|---|---|---|---|
| Integrated Technical Vision Ltd | 2 | 17.8 million | 6 Feb 2024 |
| Telecard-Pribor Ltd | 1 | 16.8 million | 11 May 2004 |
| TELECOMUNICATION TECHNOLOGIES LTD. | 1 | 16.8 million | 29 Nov 2006 |
| Ajax Systems Inc | 1 | 1 million | 29 Nov 2015 |
| Tachyon Energy | 1 | 1 million | 25 Mar 2023 |
| Viatek | 1 | 1 million | 18 Jul 2026 |
| Electrovymir LLC | 1 | 4.1 thousand | 26 Jun 2024 |
| MAG Audio LLC | 1 | 4.1 thousand | 11 Mar 2023 |
| NIK-ELEKTRONIKA Ltd | 1 | 4.1 thousand | 10 Nov 2010 |
| Nika Ltd | 1 | 4.1 thousand | 30 Jul 2008 |
| NVP TECO LTD | 1 | 4.1 thousand | 20 Jan 2023 |
| Private Enterprise "Scientific and Production Private Enterprise"Sparing-Vist Center"" | 1 | 4.1 thousand | 26 Feb 2021 |
| "Smart Systems" LLC | 1 | 4.1 thousand | 21 Jan 2021 |
| SPE Smartico, LLC | 1 | 4.1 thousand | 18 Nov 2020 |
| UNIDATA | 1 | 4.1 thousand | 30 Jul 2008 |
Every organization with blocks registered in Ukraine, sorted by total address space.