You can get information from their Web site at http://www.inmarsat.com. Each country has a signatory to Inmarsat. This signatory (normally the PTT/local provider in each country) is the Inmarsat service provider in that country. In the U.S., COMSAT was the U.S. signatory for many years - they were bought by Lockheed Martin several years ago. Lockheed Martin has announced that they intend to sell this business. You can look up Inmarsat service providers at: http://188.8.131.52/pady/index.asp
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