| Signatory Name | Country | Date Signed | Date Received |
| ACeS India Private Limited | India (Republic of) | 28/09/1998 | 05/10/1998 |
| Addvalue Communications Pte Ltd | Singapore (Republic of) | 12/02/2007 | 16/02/2007 |
| Addvalue Innovation Pte Ltd. | Singapore (Republic of) | 24/07/2014 | 01/09/2014 |
| Administración Nacional de Telecomunicaciones (ANTEL) | Uruguay (Eastern Republic of) | 06/10/1997 | 06/10/1997 |
| Agence de Régulation des Télécommunications (ART) | Cameroon (Republic of) | 04/04/1997 | 04/04/1997 |
| Agence de Régulation et de Contrôle des Télécommunications (ARCT) | Burundi (Republic of) | 03/02/1998 | 12/03/1998 |
| Agência Nacional de Telecomunicações - ANATEL | Brazil (Federative Republic of) | 10/09/1998 | 15/09/1998 |
| Angolan Institute of Communications (INACOM) | Angola (Republic of) | 15/11/2000 | 15/11/2000 |
| Apple Inc. | United States of America | 07/12/2023 | 03/01/2024 |
| Ascom Management AG | Switzerland (Confederation of) | 30/08/1999 | 31/08/1999 |
| Asia Pacific Satellite Industries Co., Ltd. | Korea (Republic of) | 01/09/2005 | 01/09/2005 |
| Asian Cellular Satellite Bgd. Ltd. | Bangladesh (People's Republic of) | 16/09/2001 | 17/09/2001 |
| AT&T Corp. | United States of America | 26/03/1997 | 01/04/1997 |
| Autoridad Nacional de los Servicios Públicos (ASEP) | Panama (Republic of) | 18/08/1998 | 25/08/1998 |
| Autorité de Régulation des Communications Electroniques et de la Poste (ARCEP-BENIN) | Benin (Republic of) | 29/10/1998 | 12/04/1999 |
| Autorité de Régulation des Télécommunications de Côte d'Ivoire (ARTCI) | Côte d'Ivoire (Republic of) | 17/09/2002 | 18/09/2002 |
| Autorité de Régulation des Télécommunications et des Postes (ARTP) | Senegal (Republic of) | 17/08/2007 | 17/08/2007 |
| Beam Communications Pty Ltd | Australia | 25/08/2017 | 04/09/2017 |
| BGH Comunicaciones | Argentine Republic | 07/02/2000 | 08/02/2000 |
| Botswana Communications Regulatory Authority (BOCRA) | Botswana (Republic of) | 25/09/1998 | 30/11/1998 |
| Carmanah Technologies Corporation | Canada | 16/01/2018 | 19/01/2018 |
| Comisión Nacional de Comunicaciones | Argentine Republic | 10/09/1997 | 10/09/1997 |
| Comisión Nacional de Telecomunicaciones (CONATEL) | Honduras (Republic of) | 21/07/1998 | 03/08/1998 |
| COMSAT Corporation | United States of America | 12/05/1997 | 16/05/1997 |
| CPAC Systems AB | Sweden | 29/03/2021 | 31/03/2021 |
| Dacom Corp. | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| DAMOS SudAmerica S.A. | Brazil (Federative Republic of) | 10/09/1998 | 15/09/1998 |
| DDI Corporation | Japan | 24/06/1997 | 03/07/1997 |
| DeLorme Publishing | United States of America | 12/06/2012 | 04/07/2012 |
| Department of Communications and Digital Technologies | South Africa (Republic of) | 10/10/1997 | 21/10/1997 |
| Department of Communications, Information Technology and the Arts - Administration of Australia | Australia | 01/08/1999 | 08/09/1999 |
| Department of Electronic Communications, Deputy Ministry of Research, Innovation and Digital Policy | Cyprus (Republic of) | 24/11/1997 | 26/11/1997 |
| Department of State - International Communications & Information Policy | United States of America | 20/03/1997 | 24/03/1997 |
| Dirección General de Política de Telecomunicaciones - Coordinación de Asuntos Internacionales - Secretaria de Comunicaciones y Transportes | Mexico | 09/03/1998 | 24/03/1998 |
| Direction des Télécommunications - Ministère d'Etat | Monaco (Principality of) | 31/07/1997 | 31/07/1997 |
| EchoStar Operating LLC | United States of America | 15/09/1998 | 16/09/1998 |
| Elbit Systems BMD and Land EW - Elisra Ltd. | Israel (State of) | 21/12/1997 | 07/01/1998 |
| Ellipso, Inc. | United States of America | 07/03/1997 | 12/03/1997 |
| Elsacom S.p.A. | Italy | 06/04/1998 | 20/04/1998 |
| Ericsson Mobile Communications (UK) Ltd. | United Kingdom of Great Britain and Northern Ireland | 06/12/1999 | 06/12/1999 |
| European Broadcasting Union | Switzerland (Confederation of) | 09/05/1997 | 09/05/1997 |
| European Commission | Belgium | 31/07/1997 | 16/09/1997 |
| EUROPEAN DATACOMM N.V. | Belgium | 28/03/2000 | 28/03/2000 |
| EuroSkyWay | Italy | 23/09/1998 | 23/09/1998 |
| EUTELSAT | France | 29/04/1998 | 30/04/1998 |
| Federal Ministry for Science and Transport | Austria | 14/12/1998 | 21/12/1998 |
| Final Analysis Communications Services, Inc. | United States of America | 02/06/2003 | 02/06/2003 |
| Final Analysis Inc. | United States of America | 17/03/1997 | 27/03/1997 |
| France Telecom | France | 15/05/1997 | 20/05/1997 |
| Global Communication by Satellite (Pty) Ltd. | South Africa (Republic of) | 12/10/2002 | 15/10/2002 |
| Global VSAT Forum | United Kingdom of Great Britain and Northern Ireland | 15/01/1999 | 15/01/1999 |
| Globalstar, Inc. | United States of America | 03/04/1997 | 03/04/1997 |
| Hitachi, Ltd. | Japan | 22/05/1997 | 29/05/1997 |
| Honeywell International Inc. | United States of America | 30/05/2017 | 07/06/2017 |
| Hyundai Electronics Industries Co.Ltd | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| Iceland Telecom Ltd. | Iceland | 28/01/1998 | 02/02/1998 |
| ICO Global Communications | United Kingdom of Great Britain and Northern Ireland | 03/04/1997 | 03/04/1997 |
| Industry Canada - Spectrum Information Technologies and Telecommunications | Canada | 10/06/1997 | 13/06/1997 |
| Inmarsat Global Limited | United Kingdom of Great Britain and Northern Ireland | 17/03/1997 | 20/03/1997 |
| Institut des Communications de la Guinée-Bissau | Guinea-Bissau (Republic of) | 11/10/2001 | 12/10/2001 |
| Instituto Nicaragüense de Telecomunicaciones y Correos (TELCOR) | Nicaragua | 20/10/1998 | 03/11/1998 |
| Intelsat US LLC | United States of America | 12/06/1997 | 18/06/1997 |
| Iridium Satellite LLC. | United States of America | 26/03/1997 | 02/04/1997 |
| Kenya Posts and Telecommunications Corporation | Kenya (Republic of) | 03/04/1997 | 03/04/1997 |
| KT Corporation (Korea Telecom) | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| KUMHO Telecom | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| KYOCERA Corporation | Japan | 18/09/1997 | 22/09/1997 |
| Kyushu Matsushita Electronic Co., Ltd | Japan | 28/01/1998 | 02/02/1998 |
| LeQ. Pty Ltd. | South Africa (Republic of) | 29/02/2000 | 29/02/2000 |
| Lesotho Telecommunications Corporation | Lesotho (Kingdom of) | 30/12/1999 | 12/01/2000 |
| Loral Space & Communications Ltd. | United States of America | 01/04/1997 | 03/04/1997 |
| Malawi Posts and Telecommunications Corporation - Postmaster General | Malawi | 25/05/1998 | 01/06/1998 |
| MCS (ORBCOMM Europe) | Netherlands (Kingdom of the) | 30/04/1997 | 02/05/1997 |
| Ministerio de Defensa Nacional - Dirección Nacional de Comunicaciones | Uruguay (Eastern Republic of) | 29/09/1998 | 09/11/1998 |
| Ministerio de Transporte y Comunicaciones - Comisión Nacional de Telecomunicaciones | Venezuela (Bolivarian Republic of) | 08/06/1999 | 14/06/1999 |
| Ministero delle Poste e delle telecomunicazioni | Italy | 13/06/1997 | 18/06/1997 |
| Ministry for Development of Information Technologies and Communications of the Republic of Uzbekistan | Uzbekistan (Republic of) | 25/09/1998 | 13/11/1998 |
| Ministry of Communication of Nigeri | Niger (Republic of the) | 05/02/2000 | 15/02/2000 |
| Ministry of Communications of Azerbaijan Republic | Azerbaijan (Republic of) | 20/07/1998 | 29/07/1998 |
| Ministry of Communications of Brazil | Brazil (Federative Republic of) | 24/06/1997 | 24/06/1997 |
| Ministry of Communications, Transports, Posts and Constructions - Dept of Posts and Telecom. | Lao People's Democratic Republic | 10/07/1997 | 24/07/1997 |
| Ministry of Communications | Georgia | 30/06/1998 | 13/11/1998 |
| Ministry of Communications | Tajikistan (Republic of) | 08/09/1998 | 09/09/1998 |
| Ministry of Digital Development, Innovations and Aerospace Industry of the Republic of Kazakhstan | Kazakhstan (Republic of) | 29/05/1998 | 12/06/1998 |
| Ministry of Economic Affairs and Climate Policy | Netherlands (Kingdom of the) | 06/03/2000 | 13/03/2000 |
| Ministry of High-Tech Industry | Armenia (Republic of) | 08/12/1998 | 17/12/1998 |
| Ministry of Home Affairs | Maldives (Republic of) | 17/02/2000 | 17/02/2000 |
| Ministry of Information Communication Technology, Postal and Courier Services | Zimbabwe (Republic of) | 17/03/1998 | 17/03/1998 |
| Ministry of Infrastructure Development - Communications Department | Mongolia | 14/03/1997 | 14/03/1997 |
| Ministry of P.T.T. - Minister's Office - International Affairs | Saudi Arabia (Kingdom of) | 27/07/1998 | 13/08/1998 |
| Ministry of Posts and Telecommunications - Telecommunications Bureau | Japan | 30/07/1997 | 31/07/1997 |
| Ministry of Roads & Communications | Sudan (Republic of the) | 25/04/1999 | 30/04/1999 |
| Ministry of Telecommunications & Information Technology | Mauritius (Republic of) | 16/10/1998 | 16/10/1998 |
| Ministry of Transport and Communications | Eritrea | 21/10/1998 | 03/11/1998 |
| Ministry of Transport and Communications | Republic of Türkiye | 22/06/1998 | 02/07/1998 |
| Ministry of Works Housing and Communication | Uganda (Republic of) | 20/07/1998 | 04/08/1998 |
| Ministère de l'Equipement - Direction Nationale des Postes et Télécommunications | Guinea (Republic of) | 02/02/1999 | 05/02/1999 |
| Ministère de la Communication et de la Culture - Office National des Télécommunications | Burkina Faso | 06/09/1999 | 23/09/1999 |
| Ministère de la Défense Nationale, de la Sécurité et l'Immigration - Chargé des Postes et Télécommunications - Direction Générale de l'Office des P&T | Gabonese Republic | 23/07/1998 | 27/07/1998 |
| Ministère de l’Economie Numérique des Postes et Télécommunications | Central African Republic | 05/10/1998 | 07/11/2001 |
| Ministère des Communications | Tunisia | 28/07/1997 | 07/08/1997 |
| Ministère des Postes et Télécommunications | Madagascar (Republic of) | 18/03/1998 | 30/04/1998 |
| Ministère des Postes, Téléphones et Télécommunications | Congo (Republic of the) | 27/09/2010 | 01/10/2010 |
| Ministère des Télécommunications | Lebanon | 03/04/1997 | 03/04/1997 |
| Ministério das Infraestruturas e habitação - Direcção-Geral das Comunicações | Cabo Verde (Republic of) | 15/03/1999 | 16/03/1999 |
| Ministério dos Transportes e Comunicações | Mozambique (Republic of) | 11/07/2004 | 27/08/2004 |
| Mitsubishi Electric Corporation | Japan | 20/06/1997 | 17/07/1997 |
| Motorola Solutions Inc. | United States of America | 27/03/1997 | 01/04/1997 |
| Namibian Communications Commission | Namibia (Republic of) | 18/08/1998 | 09/09/1998 |
| National Broadcasting and Telecommunications Commission (NBTC) | Thailand | 30/12/1998 | 11/01/1999 |
| National Communications Authority | Ghana | 04/12/1997 | 17/12/1997 |
| National Information & Communications Technology Authority (NICTA) | Papua New Guinea | 27/03/1998 | 27/08/1998 |
| National Post and Telcom Agency of Sweden | Sweden | 16/03/1998 | 19/03/1998 |
| National Telecom Agency Denmark | Denmark | 20/11/1998 | 26/11/1998 |
| National Telecommunication Regulatory Authority (NTRA) | Egypt (Arab Republic of) | 24/12/1998 | 06/01/1999 |
| NEC Corporation | Japan | 26/03/1997 | 02/04/1997 |
| North American Broadcasters Association (NABA) | Canada | 26/05/1997 | 27/05/1997 |
| Norwegian Communications Authority | Norway | 04/04/1997 | 04/04/1997 |
| Odyssey Telecommunications International Inc. (OTI) | Canada | 21/03/1997 | 21/03/1997 |
| Office fédéral de la Communication (OFCOM) | Switzerland (Confederation of) | 10/11/1997 | 13/11/1997 |
| Office National des Postes & Telecommunications - Direction Generale | Chad (Republic of) | 03/04/1997 | 04/04/1997 |
| Office of Communications - Ofcom | United Kingdom of Great Britain and Northern Ireland | 24/03/1997 | 25/03/1997 |
| OMANTEL | Oman (Sultanate of) | 20/02/2000 | 04/04/2000 |
| Omnispace LLC | United States of America | 24/07/2019 | 30/07/2019 |
| OMNITRONIC S.A. | Argentine Republic | 08/03/2000 | 08/03/2000 |
| ORBCOMM Andes Caribe, N.V. | Venezuela (Bolivarian Republic of) | 10/02/2000 | 11/02/2000 |
| ORBCOMM Australia Pacific, Ltd. | Australia | 14/04/2000 | 17/04/2000 |
| ORBCOMM de México | Mexico | 25/02/2000 | 06/03/2000 |
| ORBCOMM Global LP | United States of America | 28/03/1997 | 03/04/1997 |
| ORBCOMM Korea, Inc. | Korea (Republic of) | 16/02/1998 | 09/03/1998 |
| ORBCOMM Maghreb | Morocco (Kingdom of) | 25/05/1998 | 26/05/1998 |
| Premier Ministère Autorité de Régulation Conseil National de Régulation | Mauritania (Islamic Republic of) | 01/04/2002 | 03/04/2002 |
| PT. Asia Cellular Satellite (ACeS) | Indonesia (Republic of) | 04/08/1998 | 04/08/1998 |
| Quake Global Inc. | United States of America | 07/04/2016 | 11/04/2016 |
| Qualcomm, Inc. | United States of America | 11/01/1999 | 08/02/1999 |
| Radiocommunications Agency | United Kingdom of Great Britain and Northern Ireland | 09/07/1998 | 09/07/1998 |
| Republic of Korea | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| Samsung Electronics Co. | Korea (Republic of) | 04/04/1997 | 04/04/1997 |
| Satellite Phone Japan Ltd. | Japan | 18/06/1997 | 17/07/1997 |
| Satphone International Limited | United Kingdom of Great Britain and Northern Ireland | 05/03/1997 | 07/03/1997 |
| Sierra Leone Telecommunications Co. (SIERRATEL) | Sierra Leone | 23/10/1998 | 23/10/1998 |
| Sky and Space Global | United Kingdom of Great Britain and Northern Ireland | 14/09/2018 | 05/12/2018 |
| SkyBridge LP | United States of America | 04/04/1997 | 04/04/1997 |
| State Communications Agency under the Ministry of Digital Development of the Kyrgyz Republic | Kyrgyz Republic | 14/07/1999 | 15/07/1999 |
| Subsecretaría de Telecomunicaciones | Chile | 07/12/1998 | 15/12/1998 |
| Superintendencia General de Electricidad y Telecomun. (SIGET) | El Salvador (Republic of) | 05/12/1997 | 17/12/1997 |
| Syrian Telecom (ST) | Syrian Arab Republic | 01/12/1997 | 08/12/1997 |
| SYSTEL | Egypt (Arab Republic of) | 05/10/1998 | 06/10/1998 |
| Tanzania communications commission | Tanzania (United Republic of) | 03/04/1997 | 03/04/1997 |
| Telecom Italia Mobile S.p.A. (TIM) | Italy | 09/06/1997 | 18/06/1997 |
| Telecom Vanuatu Limited | Vanuatu (Republic of) | 29/03/1999 | 14/04/1999 |
| Telecommunication Authority of Singapore (TAS) | Singapore (Republic of) | 10/06/1998 | 12/06/1998 |
| Telecommunication Engineering Centre - Department of Telecommunication, Government of India | India (Republic of) | 10/08/2001 | 13/08/2001 |
| Telecommunication Industry Association (TIA) | United States of America | 14/03/1997 | 20/03/1997 |
| Telecommunications Administration Centre - Radio Administration | Finland | 03/04/1997 | 03/04/1997 |
| Telecommunications Administration of the Republic of Indonesia | Indonesia (Republic of) | 07/04/1997 | 18/04/1997 |
| Telecommunications Agency | Guyana | 05/11/1998 | 10/11/1998 |
| Telecommunications Regulatory Commission (TRC) | Jordan (Hashemite Kingdom of) | 19/10/1998 | 13/11/1998 |
| Telecommunications Regulatory Commission of Sri Lanka | Sri Lanka (Democratic Socialist Republic of) | 02/08/2021 | 18/08/2021 |
| Teledesic LLC | United States of America | 07/04/1997 | 18/04/1997 |
| Telefónica del Perú S.A.A. | Peru | 30/10/1997 | 04/11/1997 |
| Telenor International - Telenor Satellite Services AS | Norway | 04/05/1997 | 12/05/1997 |
| Telespazio S.p.A. | Italy | 11/04/1997 | 17/04/1997 |
| TELITAL Mobile Terminals S.p.A. | Italy | 31/08/1999 | 02/09/1999 |
| Thai Satellite Telecommunications Co., Ltd | Thailand | 05/08/1997 | 14/08/1997 |
| The Electronic Communications Office of Iceland (ECOI) | Iceland | 03/01/2002 | 07/01/2002 |
| Thrane & Thrane Norge AS | Norway | 19/04/1999 | 27/04/1999 |
| Thuraya Telecommunications Company | United Arab Emirates | 20/05/1998 | 26/05/1998 |
| Townley Communications Ltd. | United Kingdom of Great Britain and Northern Ireland | 24/03/1997 | 25/03/1997 |
| Viasat, Inc. | United States of America | 14/12/2015 | 24/12/2015 |
| VULA Communications | South Africa (Republic of) | 23/05/1997 | 27/05/1997 |
| Yotam Communications E.A. Limited | Kenya (Republic of) | 20/07/2004 | 07/08/2004 |
| Zambia Information & Communications Technology Authority (ZICTA) | Zambia (Republic of) | 17/07/2002 | 02/09/2002 |
| ZanTel (Zanzibar Telecom Ltd.) | Ireland | 25/09/1997 | 06/10/1997 |
| Zoleo Inc. | Canada | 02/10/2019 | 11/10/2019 |
GMPCS-MoU Signatories
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In some cases, the information indicated below reflects the data provided to ITU when the GMPCS-MoU was signed.
Total= 175 organisations