ESA (European Space Agency)
NASA (National Aeronautics and Space Administration)
JPL (Jet Propulsion Laboratory)
JAXA (Japan Aerospace Exploration Agency)
PANAMSAT
ARABSAT (Arab Satellite Communications Organization)
ASIASAT (Asia Satellite Telecommunications)
OOSA (United Nations Office for Outer Space Affairs)
CNES (Centre Nationale d'Etudes Spatiales)
DLR (Deutschen Zentrum für Luft- und Raumfahrt)
ASI (Agenzia Spaziale Italiana)
BNSC (British National Space Center)
RKA (Russian
Aviation and Space Agency) 
Link no disponible
www.rosaviakosmos.ru
NLR (National
Aerospace Laboratory)
NIVR (Netherlands Agency for Aerospace Programs)
NISO (Netherlands
Industrial Space Organization)
SRON
(Space Research Organization Netherlands)
TNO (Netherlands
Organisation for Applied Scientific Research)
ASA (Austrian Space Agency)
ROSA (Romanian Space Agency)
SNSB (Swedish National Space Board)
NSC (Norwegian Space Centre)
SPO (Belgium's Space Program Office)
DNSC (Danish National Space Center)
European Commission's Space Coordination Group
ESSC
(European Space Science Committee)
TEKES Technology
Development Center of Finland
ONERA
(Office National d'Etudes et de Recherches
Aérospatiales)
CSO (Czech Space Office)
Polish Space Research Center
Space Office of Hungary
SSO (Swiss Space Office)
NKAU (Natsionalnie Kosmichne Agentsvo Ukrayni)
INTA (Instituto Nacional de Tecnología Aeroespacial)
Israel Space Agency
CNSA (China National Space Administration)
ISRO (Indian Space Research Organisation)
CSA (Canadian Space Agency)
INPE (Brazilian Space Agency)
CONAE (Comisión Nacional de Actividades Espaciales,
Argentina)
COSSA (CSIRO Office of Space Science and Applications,
Australia)
NSPO (National Space Program Office, Taiwan)
EUMETSAT (European Organisation for the Exploitation of Meteorological
Satellites)
NOAA (National
Oceanic and Atmospheric Administration)
International Telecommunications Satellite Organization
Advanced Satellite Mobile Systems-Task Force Specific Support Action (MoSSA)
Mobile Applications & sErvices based on Satellite & Terrestrial
inteRwOrking (MAESTRO)
Advanced Satellite Mobile Systems Task Force (ASMS-TF)
Integral Satcom Initiative (ISI) 
Terrestrial Wireless Infrastructure integrated with Satellite
Telecommunications for E-Rural (TWISTER) 
The Radio Amateur Satellite Corporation (AMSAT) 
The Consultative Committee for Space Data Systems (CCSDS)
HISPASAT
THURAYA
HUGHES
