| Organization | Blocks | Addresses | First registered |
|---|---|---|---|
| Industrial Software Co | 2 | 33.6 million | 3 Aug 2013 |
| 2C - Trifonov & Co | 1 | 16.8 million | 20 Jan 2011 |
| DATECS LTD., | 1 | 16.8 million | 25 Aug 2009 |
| Deltacom Electronics Ltd | 1 | 16.8 million | 8 Oct 2008 |
| Denkovi Assembly Electronics LTD | 1 | 16.8 million | 23 May 2013 |
| DEVA Broadcast Ltd. | 1 | 16.8 million | 10 Jan 2019 |
| DIGITAL SOLUTIONS LTD | 1 | 16.8 million | 18 Jun 2008 |
| Eurodesign BG LTD | 1 | 16.8 million | 22 Mar 2009 |
| MS-Magnet | 1 | 16.8 million | 17 Oct 2013 |
| NEOMONTANA ELECTRONICS | 1 | 16.8 million | 13 May 2011 |
| Shelly Europe LTD | 1 | 16.8 million | 28 Jul 2026 |
| Smartcom - Bulgaria AD | 1 | 16.8 million | 1 Aug 2015 |
| Teracom Ltd. | 1 | 16.8 million | 15 Jan 2019 |
| Tremol Ltd. | 1 | 16.8 million | 7 Jan 2012 |
| KMtronic ltd | 9 | 1.1 million | 25 Aug 2013 |
| SiS Technology | 2 | 1.1 million | 12 Jun 2016 |
| Teletek Electronics | 2 | 1.1 million | 30 Jul 2008 |
| Abrites Ltd. | 1 | 1 million | 21 Jan 2018 |
| BTL Industries JSC | 1 | 1 million | 27 Jul 2022 |
| eSenseLab Ltd. | 1 | 1 million | 14 Feb 2019 |
| Eurolan Ltd | 1 | 1 million | 23 Mar 2021 |
| Globex 99 LTD | 1 | 1 million | 7 May 2017 |
| MyGregor Ltd | 1 | 1 million | 6 Jan 2022 |
| OLIMEX Ltd | 1 | 1 million | 10 Dec 2017 |
| Residence Control Ltd | 1 | 1 million | 9 Feb 2022 |
| Teletek Electronics JSC | 1 | 1 million | 8 Nov 2025 |
| Yovil Ltd. | 1 | 1 million | 27 Jan 2024 |
| Andy-L Ltd | 2 | 8.2 thousand | 8 Dec 2013 |
| Melissa Climate Jsc | 2 | 8.2 thousand | 15 Jul 2020 |
| Smartcom-Bulgaria AD | 2 | 8.2 thousand | 30 Jul 2008 |
| ECoCoMS Ltd. | 1 | 4.1 thousand | 30 Jun 2020 |
| ELTRADE Ltd | 1 | 4.1 thousand | 31 Mar 2013 |
| Hi Tech Electronics Ltd | 1 | 4.1 thousand | 4 Jul 2010 |
| InRay Solutions Ltd. | 1 | 4.1 thousand | 30 Jul 2008 |
| Medical Monitoring Center OOD | 1 | 4.1 thousand | 4 Mar 2018 |
| Naturela Ltd. | 1 | 4.1 thousand | 30 Jul 2008 |
| OPTIX JSC | 1 | 4.1 thousand | 2 Aug 2015 |
| PIXEYE LTD | 1 | 4.1 thousand | 30 Jul 2008 |
| Qntra Technology | 1 | 4.1 thousand | 7 Dec 2018 |
| Rhombus Europe | 1 | 4.1 thousand | 18 Oct 2022 |
| UniPOS EOOD | 1 | 4.1 thousand | 19 Apr 2025 |
Every organization with blocks registered in Bulgaria, sorted by total address space.