| Intuitive Machines (IM) |
 United States |
Commercial |
2013 |
0 |
0 |
0 |
| INVAP (INVAP) |
 Argentina |
Commercial |
|
0 |
0 |
0 |
| Investigaciones Aplicads Sociedad del Estado (INVAP SE) (INVAP) |
Argentina |
Commercial |
1976 |
0 |
0 |
0 |
| Ionosphere Research Insitute (Breisach) |
 Germany |
Academic / research |
1947 |
0 |
0 |
0 |
| Iowa State University (Iowa State) |
United States |
Academic / research |
1858 |
0 |
0 |
0 |
| Iran Space Research Institute (ISRC) |
 Iran |
Government / agency |
2010 |
0 |
0 |
0 |
| Iran Telecommunication Research Center (ITRC) |
Iran |
Government / agency |
1970 |
0 |
0 |
0 |
| Iran University of Science and Technology (IUST) |
Iran |
Academic / research |
1929 |
0 |
0 |
0 |
| Iraqi Army (Iraqi Army) |
 Iraq |
Government / agency |
1924 |
0 |
0 |
0 |
| Irvine Public Schools Foundation (IPSF) |
United States |
Academic / research |
1976 |
0 |
0 |
0 |
| ISC Kosmotras (ISCK) |
 Russia |
Commercial |
|
0 |
0 |
1 |
| Ishikawajima-Harima Heavy Industries Co. Ltd (IHI) |
 Japan |
Commercial |
1853 |
0 |
0 |
0 |
| ISISPACE (ISISPACE) |
 Netherlands |
Commercial |
2006 |
0 |
0 |
0 |
| iSky Technology s.r.o (iSky) |
 Czechia |
Commercial |
2016 |
0 |
0 |
0 |
| Islamic Revolutionary Guard Corps Aerospace Force (IRGCAF) |
Iran |
Government / agency |
1985 |
0 |
0 |
2 |
| ispace (ispace) |
Japan |
Commercial |
2010 |
0 |
0 |
0 |
| iSpace Europe (iSpace Europe) |
 Luxembourg |
Commercial |
2017 |
0 |
0 |
0 |
| Israel Aerospace Industries (IAI) |
 Israel |
Commercial |
1953 |
0 |
0 |
1 |
| Israel Defense Forces (IAF Israeli Air Force) (IDF) |
Israel |
Government / agency |
1948 |
0 |
0 |
0 |
| Israeli Air and Space Force (IASF) |
Israel |
Government / agency |
2004 |
0 |
0 |
0 |
| Israeli Air Defense Network, Israel Defense Forces (IADN) |
Israel |
Government / agency |
1948 |
0 |
0 |
0 |
| Israeli Air Force (IAF) |
Israel |
Government / agency |
1948 |
0 |
0 |
0 |
| Israeli Ministry of Defense (MHB) |
Israel |
Government / agency |
1948 |
0 |
0 |
0 |
| Israeli Navy (IDF Navy) |
Israel |
Government / agency |
1948 |
0 |
0 |
0 |
| Israeli Space Agency (ISA) |
Israel |
Government / agency |
|
0 |
0 |
1 |
| ISRO Satellite Center (ISRO SAC/Banga) |
 India |
Government / agency |
|
0 |
0 |
0 |
| ISRO Space Applications Center (ISRO SAC/Ahm.) |
India |
Government / agency |
|
0 |
0 |
0 |
| ISRO/Thumba Equatorial Rocket Launch Station (ISRO TERLS) |
India |
Government / agency |
1969 |
0 |
0 |
0 |
| Italian Air Force (IAF) |
 Italy |
Government / agency |
1923 |
0 |
0 |
0 |
| ITT Federal Laboratories (ITT) |
United States |
Commercial |
|
0 |
0 |
0 |
| Jacobs Solutions Inc. (Jacobs) |
United States |
Commercial |
1947 |
0 |
0 |
0 |
| Japan Defense Agency (JDA) |
Japan |
Government / agency |
1954 |
0 |
0 |
0 |
| Japan Defense Ministry (Japan MoD) |
Japan |
Government / agency |
2007 |
0 |
0 |
0 |
| Jeppiaar Institute of Technology (Jeppiaar) |
India |
Academic / research |
2011 |
0 |
0 |
0 |
| Jet Propulsion Laboratory (JPL) |
United States |
Government / agency |
1936 |
0 |
0 |
0 |
| Jet Propulsion Science Research Institute (ROE) |
 United Kingdom |
Government / agency |
1896 |
0 |
0 |
0 |
| Jiangsu Yinglong Satellite Tech Co. Ltd. (Yinglong) |
 China |
Commercial |
2024 |
0 |
0 |
0 |
| Jigang Group (Jigang Jituan) |
China |
Commercial |
1958 |
0 |
0 |
0 |
| Jihua Laboratory (Jihua Lab) |
China |
Government / agency |
2017 |
0 |
0 |
0 |
| Jing'an District Youth Activity Center (Jing'an) |
China |
Academic / research |
2025 |
0 |
0 |
0 |
| Jiuzhou Yunjian Space Tech Co Ltd. (JZYJ) |
China |
Commercial |
2017 |
0 |
0 |
0 |
| Jodrell Bank Observatory, Univ. of Manchester (Jodrell) |
United Kingdom |
Academic / research |
1957 |
0 |
0 |
0 |
| Johns Hopkins Univ. (JHU) |
United States |
Academic / research |
1876 |
0 |
0 |
0 |
| JSC Information Satellite Systems (JSC-ISS) |
Russia |
Commercial |
|
0 |
0 |
0 |
| Junkers Flugzeug- und Motorenwerke GmBH (Junkers) |
Germany |
Commercial |
1958 |
0 |
0 |
0 |
| Kacific Broadband Satellies Ltd (Kacific) |
 Singapore |
Commercial |
|
0 |
0 |
0 |
| Kagoshima Daigaku (Kagoshima U) |
Japan |
Academic / research |
1949 |
0 |
0 |
0 |
| Kaiser Marquardt (Kaiser Marquardt) |
United States |
Commercial |
1990 |
0 |
0 |
0 |
