| Organization | Blocks | Addresses | First registered |
|---|---|---|---|
| Kontakt Micro-Location Sp z o.o. | 3 | 18.9 million | 7 Nov 2020 |
| ANDRA Sp. z o. o. | 2 | 17.8 million | 31 Oct 2015 |
| Fibrain | 2 | 17.8 million | 15 Nov 2018 |
| LeoLabs | 2 | 17.8 million | 17 Jul 2019 |
| SLICAN sp. z o.o. | 4 | 16.8 million | 30 Jul 2008 |
| Transbit Sp. z o.o. | 3 | 16.8 million | 30 Jul 2008 |
| Creotech Quantum SA | 2 | 16.8 million | 30 Nov 2014 |
| DGT Sp. z o.o. | 2 | 16.8 million | 17 Mar 2004 |
| MindMade Sp. z o.o. | 2 | 16.8 million | 31 Mar 2013 |
| SATEL sp. z o.o. | 2 | 16.8 million | 1 Mar 2007 |
| APATOR S.A. | 1 | 16.8 million | 20 Apr 2013 |
| Asmax Solutions | 1 | 16.8 million | 8 Sep 2003 |
| AVSystem sp. z o. o. | 1 | 16.8 million | 8 Oct 2008 |
| BITSTREAM sp. z o.o. | 1 | 16.8 million | 5 Oct 2021 |
| CDR Sp. z o.o. Sp. k. | 1 | 16.8 million | 29 Jun 2016 |
| Cyfrowy Polsat SA | 1 | 16.8 million | 18 Jun 2008 |
| Dynacon Sp. z o.o. | 1 | 16.8 million | 28 Oct 2025 |
| eFAB P.S.A. | 1 | 16.8 million | 19 Nov 2025 |
| ELPROMA ELEKTRONIKA SP Z O O | 1 | 16.8 million | 11 Apr 2024 |
| Energotest | 1 | 16.8 million | 1 Dec 2009 |
| Fibar Group sp. z o.o. | 1 | 16.8 million | 6 Oct 2012 |
| Forcom Sp. z o.o. | 1 | 16.8 million | 13 Apr 2006 |
| Game Technologies SA | 1 | 16.8 million | 16 Jul 2013 |
| GLOBO Multimedia Sp. z o.o. Sp.k. | 1 | 16.8 million | 27 Mar 2014 |
| GZT Telkom-Telmor sp. z o.o. | 1 | 16.8 million | 25 Jan 2009 |
| IFTER Jerzy Taczalski | 1 | 16.8 million | 7 Jul 2026 |
| Interphone Service | 1 | 16.8 million | 17 Apr 2021 |
| KRYPTON POLSKA | 1 | 16.8 million | 31 Aug 2012 |
| LARS | 1 | 16.8 million | 23 Sep 2018 |
| LEDATEL sp. z o.o. i Wspólnicy sp.k | 1 | 16.8 million | 16 Mar 2026 |
| LG Electornics | 1 | 16.8 million | 20 Aug 2024 |
| Linepro Sp. z o.o. | 1 | 16.8 million | 4 Apr 2012 |
| MATT R.P.Traczynscy Sp.J. | 1 | 16.8 million | 18 Aug 2007 |
| MCD ELECTRONICS SP. Z O.O. | 1 | 16.8 million | 1 Apr 2011 |
| MicroMade Galka i Drozdz sp.j. | 1 | 16.8 million | 28 Jan 2011 |
| Military Communication Institute | 1 | 16.8 million | 24 Jul 2009 |
| Newag SA | 1 | 16.8 million | 15 Sep 2011 |
| NOVAMEDIA INNOVISION SP. Z O.O. | 1 | 16.8 million | 30 Sep 2010 |
| Novus Security Sp. z o.o. | 1 | 16.8 million | 1 Mar 2007 |
| NSS Sp. z o.o. | 1 | 16.8 million | 23 May 2019 |
| OPTIMUS IC S.A. | 1 | 16.8 million | 11 Dec 2004 |
| ORANGE POLSKA | 1 | 16.8 million | 18 Jun 2014 |
| OSLiNK Sp. z o.o. | 1 | 16.8 million | 16 Sep 2005 |
| Platan sp. z o.o. sp. k. | 1 | 16.8 million | 14 Jun 2013 |
| Prokom Software SA | 1 | 16.8 million | 7 May 2005 |
| QDIQO Sp. z o.o. | 1 | 16.8 million | 9 Mar 2018 |
| R&G PLUS Sp. z o.o. | 1 | 16.8 million | 22 Jun 2012 |
| Rail-Mil Sp. z o.o. Sp. K. | 1 | 16.8 million | 20 Mar 2021 |
| ROGER D.Wensker, G.Wensker sp.j. | 1 | 16.8 million | 1 Apr 2011 |
| Semihalf | 1 | 16.8 million | 11 Jul 2009 |
| Sentivision | 1 | 16.8 million | 15 Mar 2006 |
| SIMEX Sp. z o.o. | 1 | 16.8 million | 17 Mar 2012 |
| Sorter Sp. j. Konrad Grzeszczyk MichaA, Ziomek | 1 | 16.8 million | 21 Dec 2013 |
| Tahoe | 1 | 16.8 million | 9 Sep 2005 |
| TechVoIP Sp z o.o. | 1 | 16.8 million | 9 Sep 2004 |
| TELDAT Sp.J. | 1 | 16.8 million | 22 Aug 2006 |
| UNICARD SA | 1 | 16.8 million | 13 Mar 2012 |
| Upos System sp. z o.o. | 1 | 16.8 million | 9 Jan 2010 |
| VECTOR SP. Z O.O. | 1 | 16.8 million | 18 Jun 2008 |
| VIGO System S.A. | 1 | 16.8 million | 28 May 2011 |
| WASKO S.A. | 1 | 16.8 million | 20 Nov 2007 |
| WB Electronics Sp. z o.o. | 1 | 16.8 million | 14 Jul 2006 |
| Wilk Elektronik S.A. | 1 | 16.8 million | 15 Oct 2022 |
| Z.M.P. RADWAG | 1 | 16.8 million | 4 Nov 2005 |
| Z.U.K. Elzab S.A. | 1 | 16.8 million | 25 Aug 2011 |
| ZAKLAD ELEKTRONICZNY SIMS | 1 | 16.8 million | 20 Jan 2011 |
| Husty M.Styczen J.Hupert Sp.J. | 7 | 1.1 million | 26 Feb 2012 |
| Camsat Przemysław Gralak | 3 | 1.1 million | 15 May 2016 |
| EFENTO T P SZYDŁOWSKI K ZARĘBA SPÓŁKA JAWNA | 2 | 1.1 million | 7 Aug 2016 |
| EVER Sp. z o.o. | 2 | 1.1 million | 30 Jul 2008 |
| KRISTECH Krzysztof Kajstura | 2 | 1.1 million | 11 Jun 2019 |
| LUMEL S.A. | 2 | 1.1 million | 30 Jul 2008 |
| POSNET Polska S.A. | 2 | 1.1 million | 30 Jul 2008 |
| S Labs sp. z o.o. | 2 | 1.1 million | 21 May 2017 |
| Advant sp. z o.o. | 1 | 1 million | 29 Aug 2025 |
| Ambient-System sp. z o.o. | 1 | 1 million | 25 Sep 2019 |
| ASCS Sp. z o.o. | 1 | 1 million | 3 Feb 2023 |
| BIOT Sp. z o.o. | 1 | 1 million | 5 Feb 2019 |
| Comarch S.A. | 1 | 1 million | 8 Jan 2017 |
| CTHINGS.CO sp. z o.o. | 1 | 1 million | 6 Feb 2026 |
| EBS Sp. z o.o. | 1 | 1 million | 25 Sep 2015 |
| Ekoenergetyka - Polska S.A. | 1 | 1 million | 20 Nov 2020 |
| Eveo sp. z o.o. | 1 | 1 million | 9 Jul 2026 |
| Green ACS Sp. z o.o. | 1 | 1 million | 4 Sep 2026 |
| Impakt S.A. | 1 | 1 million | 1 Apr 2018 |
| Inveo | 1 | 1 million | 13 Feb 2020 |
| KLIMAT SOLEC Sp. z o.o. | 1 | 1 million | 16 Oct 2015 |
| LAB-EL ELEKTRONIKA LABORATORYJNA | 1 | 1 million | 8 Sep 2023 |
| Lechpol Electronics Leszek Sp.k. | 1 | 1 million | 15 Mar 2024 |
| Lubelskie Fabryki Wag FAWAG S.A. | 1 | 1 million | 16 Oct 2018 |
| Maxcom S.A. | 1 | 1 million | 16 Jan 2019 |
| MEDCOM sp. z o.o. | 1 | 1 million | 25 Jun 2017 |
| NEKMA M.Mesek P.Mesek B.Mesek | 1 | 1 million | 25 Jul 2024 |
| NEO.NET Jakub Koperski | 1 | 1 million | 18 Oct 2024 |
| NOITAC sp. z o.o. sp.k. | 1 | 1 million | 28 Jan 2022 |
| Olte Climate sp. z o.o. | 1 | 1 million | 13 Nov 2025 |
| ORBITVU Sp. z o. o. | 1 | 1 million | 6 May 2021 |
| P.H.U. Metering Anna Moder | 1 | 1 million | 28 Jul 2021 |
| Pineberry Pi | 1 | 1 million | 7 Mar 2024 |
| Polska Fabryka Wodomierzy i Ciep?omierzy FILA | 1 | 1 million | 22 Mar 2020 |
| Process-Electronic Sp. z o.o. | 1 | 1 million | 16 Oct 2015 |
| Proximus sp. z .o.o. | 1 | 1 million | 17 Feb 2026 |
| Sidus Novum Sp. z o. o. | 1 | 1 million | 16 Oct 2015 |
| Tedee Sp. z o.o. | 1 | 1 million | 15 Sep 2026 |
| Terma Sp. z o.o. | 1 | 1 million | 16 Jul 2017 |
| Vecima Networks Inc. | 1 | 1 million | 20 Oct 2023 |
| Integer.pl S.A. | 12 | 49.2 thousand | 25 Mar 2020 |
| BESO sp. z o.o. | 5 | 20.5 thousand | 7 Mar 2019 |
| INVENTIA Sp. z o.o. | 5 | 20.5 thousand | 24 Aug 2022 |
| Sonel S.A. | 4 | 16.4 thousand | 30 Nov 2014 |
| Elektronik Art | 3 | 12.3 thousand | 10 Aug 2014 |
| Plum sp. z.o.o. | 3 | 12.3 thousand | 13 Jul 2014 |
| TCL OPERATIONS POLSKA SP. Z O.O. | 3 | 12.3 thousand | 17 Jul 2024 |
| ENTE Sp. z o.o. | 2 | 8.2 thousand | 20 May 2013 |
| InfoMac Sp. z o. o. Sp. k. | 2 | 8.2 thousand | 20 May 2013 |
| InventLab s.c. | 2 | 8.2 thousand | 21 Oct 2012 |
| METRONIC APARATURA KONTROLNO - POMIAROWA | 2 | 8.2 thousand | 8 Oct 2008 |
| Vemco Sp. z o. o. | 2 | 8.2 thousand | 19 Feb 2012 |
| 3City Electronics | 1 | 4.1 thousand | 25 Jan 2015 |
| 3DGence sp. z o.o. | 1 | 4.1 thousand | 11 Jun 2019 |
| Acte Sp. z o.o. | 1 | 4.1 thousand | 30 Jul 2008 |
| Aksel sp. z o.o. | 1 | 4.1 thousand | 18 May 2024 |
| APProSoftware.com | 1 | 4.1 thousand | 30 Jul 2008 |
| ASPEL S.A. | 1 | 4.1 thousand | 30 Jul 2008 |
| astozi consulting Tomasz Zieba | 1 | 4.1 thousand | 15 Aug 2014 |
| ATTE POWER | 1 | 4.1 thousand | 15 Jun 2026 |
| AXED Jakubowski Wojciechowski sp.j. | 1 | 4.1 thousand | 1 Nov 2009 |
| AXIS Sp z o.o. | 1 | 4.1 thousand | 10 Apr 2024 |
| BORNICO | 1 | 4.1 thousand | 5 Jan 2023 |
| Conclusive Engineering | 1 | 4.1 thousand | 12 Nov 2019 |
| Contec | 1 | 4.1 thousand | 30 Jul 2008 |
| Contrans TI sp. z o.o. | 1 | 4.1 thousand | 2 Jun 2013 |
| CTG sp. z o. o. | 1 | 4.1 thousand | 10 Apr 2016 |
| Cyberteam Sp z o o | 1 | 4.1 thousand | 1 Jun 2014 |
| DDTRONIK Dariusz Dowgiert | 1 | 4.1 thousand | 31 Mar 2013 |
| EDFelectronics JRMM Sp z o.o. sp.k. | 1 | 4.1 thousand | 22 Jul 2018 |
| Elektro-System s.c. | 1 | 4.1 thousand | 12 Apr 2015 |
| Elektrometal SA | 1 | 4.1 thousand | 14 Jul 2013 |
| Elektronik Art S.C. | 1 | 4.1 thousand | 17 Jun 2018 |
| ELPROC sp. z o.o. | 1 | 4.1 thousand | 30 Jul 2008 |
| Embedded Systems Lukasz Panasiuk | 1 | 4.1 thousand | 8 Jan 2017 |
| Emtel System Sp. z o.o. | 1 | 4.1 thousand | 30 Apr 2017 |
| Eneon sp. z o.o. | 1 | 4.1 thousand | 19 Nov 2020 |
| ENIGMA SOI Sp. z o.o. | 1 | 4.1 thousand | 31 Jul 2022 |
| Euro-Konsult Sp. z o.o. | 1 | 4.1 thousand | 17 Jan 2010 |
| Everest Audio Labs | 1 | 4.1 thousand | 12 Sep 2026 |
| EXATEL | 1 | 4.1 thousand | 12 Nov 2020 |
| Fibrain Co. Ltd. | 1 | 4.1 thousand | 31 Mar 2013 |
| FIDELTRONIK POLAND SP. Z O.O. | 1 | 4.1 thousand | 12 Jul 2015 |
| FREY S.J. | 1 | 4.1 thousand | 9 May 2023 |
| GDE Polska | 1 | 4.1 thousand | 14 Jul 2013 |
| GORAMO - Janusz Gorecki | 1 | 4.1 thousand | 31 Mar 2013 |
| Grinn Sp. z o.o. | 1 | 4.1 thousand | 2 Dec 2025 |
| Hitachi Energy Poland sp. Z o o | 1 | 4.1 thousand | 18 Jul 2024 |
| HSDC Sp. z o.o. | 1 | 4.1 thousand | 8 Jul 2012 |
| ICsec S.A. | 1 | 4.1 thousand | 9 Oct 2020 |
| IMMOLAS | 1 | 4.1 thousand | 20 Nov 2020 |
| Institute of Power Engineering, Gdansk Division | 1 | 4.1 thousand | 24 Aug 2014 |
| Integrotech sp. z o.o. | 1 | 4.1 thousand | 24 Jan 2019 |
| JPEmbedded Mazan Filipek Sp. J. | 1 | 4.1 thousand | 16 May 2020 |
| JSK System | 1 | 4.1 thousand | 4 Mar 2018 |
| KOMPAN Pawel Sokolowski | 1 | 4.1 thousand | 23 Jun 2013 |
| Konsmetal S.A. | 1 | 4.1 thousand | 13 Jun 2010 |
| Kospel S.A. | 1 | 4.1 thousand | 16 Jan 2020 |
| KRESS-NET Krzysztof Rutecki | 1 | 4.1 thousand | 19 Oct 2008 |
| KRISTECH | 1 | 4.1 thousand | 1 Nov 2009 |
| LAB-EL ELEKTRONIKA LABORATORYJNA S.J. | 1 | 4.1 thousand | 30 Jul 2008 |
| Lanex S.A. | 1 | 4.1 thousand | 30 Jul 2008 |
| Lechpol Electronics Spółka z o.o. Sp.k. | 1 | 4.1 thousand | 28 Feb 2024 |
| MEDIAM Sp. z o.o. | 1 | 4.1 thousand | 20 Mar 2016 |
| Metron Sp. z o.o. | 1 | 4.1 thousand | 30 Jul 2008 |
| Metronic AKP sp.j. | 1 | 4.1 thousand | 19 Dec 2023 |
| NATIXON Sp. z o.o. | 1 | 4.1 thousand | 24 Jul 2026 |
| Netemera Sp. z o.o. | 1 | 4.1 thousand | 3 Jul 2016 |
| NEXT! s.c. S.Piela B.Dryja | 1 | 4.1 thousand | 15 Apr 2013 |
| Numeron Sp. z o.o. | 1 | 4.1 thousand | 30 Jul 2008 |
| PACOMP Sp. z o.o. | 1 | 4.1 thousand | 23 May 2010 |
| PolCam Systems Sp. z o.o. | 1 | 4.1 thousand | 20 Oct 2022 |
| POLON-ALFA S.A. | 1 | 4.1 thousand | 28 Jun 2025 |
| Polskie Sady Nowe Podole Sp. z o.o. | 1 | 4.1 thousand | 13 Nov 2020 |
| POLSYSTEM SI SP. Z O.O., S.K.A. | 1 | 4.1 thousand | 3 Jul 2016 |
| POLVISION | 1 | 4.1 thousand | 10 Aug 2014 |
| PREVAC sp. z o.o. | 1 | 4.1 thousand | 31 Mar 2013 |
| Przemyslowy Instytut Automatyki i Pomiarow | 1 | 4.1 thousand | 23 Apr 2017 |
| PXM Marek Zupnik spolka komandytowa | 1 | 4.1 thousand | 9 Sep 2023 |
| PXM sp.k. | 1 | 4.1 thousand | 26 Oct 2014 |
| Quantum Blockchains Sp. z o.o. | 1 | 4.1 thousand | 1 Apr 2025 |
| RADMOR S.A. | 1 | 4.1 thousand | 9 Jun 2013 |
| Reckeen HDP Media sp. z o.o. sp. k. | 1 | 4.1 thousand | 24 Jun 2018 |
| SiGarden Sp z o.o. | 1 | 4.1 thousand | 18 Apr 2010 |
| Silvair | 1 | 4.1 thousand | 20 May 2013 |
| Softgent sp. z o.o. | 1 | 4.1 thousand | 15 Aug 2024 |
| SOLVERIS sp. z o.o. | 1 | 4.1 thousand | 19 Jun 2016 |
| System 11 Sp. z o.o. | 1 | 4.1 thousand | 26 Mar 2017 |
| T4I Sp. z o.o. | 1 | 4.1 thousand | 4 Apr 2024 |
| Tele and Radio Research Institute | 1 | 4.1 thousand | 30 Jul 2008 |
| TELIUM s.c. | 1 | 4.1 thousand | 30 Jul 2008 |
| Traffic Polska sp. z o. o. | 1 | 4.1 thousand | 17 Dec 2024 |
| Trineo Systems Sp. z o.o. | 1 | 4.1 thousand | 26 Oct 2023 |
| Uni Control System Sp. z o. o. | 1 | 4.1 thousand | 21 Feb 2016 |
| Vissavi sp. z o.o. | 1 | 4.1 thousand | 6 Jan 2023 |
| Vortex Sp. z o.o. | 1 | 4.1 thousand | 2 Jul 2024 |
| Wincor Nixdorf Sp. z o.o. | 1 | 4.1 thousand | 8 Jan 2012 |
| Zaklad Energoelektroniki Twerd | 1 | 4.1 thousand | 12 Aug 2018 |
| ZPAS S.A. | 1 | 4.1 thousand | 22 Mar 2020 |
Every organization with blocks registered in Poland, sorted by total address space.