| Iran Telecom Innovations | Tehran |
| Iran University of Science & Technology | |
| Iran University of Science & Technology - School of Computer Engineering | Tehran |
| Iran University of Science & Technology - School of Electrical Engineering | Tehran |
| Iran University of Science & Technology - School of Mathematics | Tehran |
| Irancell | Tehran |
| Irandisk | Tehran |
| IranDNN | Tehran |
| Iranet | Tehran |
| Irangate | Tehran |
| Iranhost | Tehran |
| Iranian Academic Center for Education Culture & Research | |
| Iranian e-Commerce Development Co. | Tehran |
| Iranian Research and Academic NETwork | Tehran |
| Iranian Research Institute for Information Science and Technology | Tehran |
| Iranian Research Organization for Science and Technology | |
| Iranian Society of Cryptology | Tehran |
| Iranian Space Agency | Tehran |
| IranOCR.ir | Razavi Khorasan |
| IranWebs | Tehran |
| IranWebService Corporation | Tehran |
| IRNIC | Tehran |
| IRPower | Tehran |
| Irthco | Tehran |
| Isfahan University of Technology - Department of Electrical and Computer Engineering | Isfahan |
| Isfahan University of Technology - Department of Mathematical Sciences | Isfahan |
| Islamic Azad University | |
| Islamic Azad University of Abarkouh | |
| ITIran | Tehran |
| IXD Iran | Tehran |
| Jamasp | Tehran |
| Janbazan Medical & Engineering Research Center | |
| Javacup.ir | Tehran |
| Javaneh | Tehran |
| Jobinja | Tehran |
| Kadhous Institute of Higher Education | |
| Kahkeshan Institute of Technology | Tehran |
| Karafarin Bank | Tehran |
| Karait | Tehran |
| KaraPardaz | Tehran |
| Karaya | Tehran |
| Karr Higher Education Institute | |
| Khazar Institute of Higher Education | |
| Khorasan Science and Technology Park | Khorasan-e Razavi |
| Komesh Higher Education Institute | |
| Koosha International Center of Applied Science & Technology | |
| Limoo | Tehran |
| Linkestan | Tehran |
| Mahaksoft | Tehran |
| Mamsani Higher Education Center | |