| Organization | Blocks | Addresses | First registered |
|---|---|---|---|
| EYKON Solutions S.A. | 3 | 50.3 million | 7 Sep 2018 |
| Dialog Semiconductor Hellas SA | 2 | 33.6 million | 24 May 2014 |
| Antonios A. Chariton | 1 | 16.8 million | 6 Aug 2024 |
| Crypto S.A. | 1 | 16.8 million | 13 Jun 2006 |
| e-zy.net | 1 | 16.8 million | 3 Jun 2004 |
| Gennet s.a. | 1 | 16.8 million | 25 Jun 2007 |
| INTRACOM DEFENSE S.A. | 1 | 16.8 million | 27 Jul 2022 |
| Intracom S.A. | 1 | 16.8 million | 17 Apr 2001 |
| Intracom SA Telecom Solutions | 1 | 16.8 million | 15 Feb 2023 |
| MAT S.A. (Mircrelec Advanced Technology) | 1 | 16.8 million | 21 Dec 2003 |
| Oxygen Broadband s.a. | 1 | 16.8 million | 1 Dec 2018 |
| Paradox Hellas S.A. | 1 | 16.8 million | 20 Feb 2008 |
| UNIBRAIN S.A. | 1 | 16.8 million | 4 Jun 2001 |
| Cubitech | 5 | 1.1 million | 15 Nov 2015 |
| Hilo | 2 | 1.1 million | 30 Apr 2020 |
| ALEKTO-SYSTEMS LTD | 1 | 1 million | 19 May 2023 |
| DeepSea Technologies | 1 | 1 million | 17 Jun 2026 |
| Lemco IKE | 1 | 1 million | 21 Apr 2023 |
| Satways Ltd | 1 | 1 million | 27 Feb 2026 |
| Aineas | 1 | 4.1 thousand | 24 Aug 2026 |
| InAccess Networks | 1 | 4.1 thousand | 30 Jul 2008 |
| InAccess Networks SA | 1 | 4.1 thousand | 23 Feb 2014 |
| MONITOR ELECTRONICS LTD | 1 | 4.1 thousand | 30 Jul 2008 |
| TELESTRIDER SA | 1 | 4.1 thousand | 7 Mar 2024 |
Every organization with blocks registered in Greece, sorted by total address space.