The Global Mobile Satellite System (GMSS) consists of several satellite phone providers serving private customers.
As of 2023, ranges of numbers have been assigned to two GMSS carriers: In 1996, the ITU introduced country code +881 for direct international dialing of phones on GMSS providers.
The next digit following the country code is allocated (two at a time) to a particular GMSS carrier:[1][2] Inmarsat is a satellite-based communications provider, but it is primarily a maritime service and is not generally considered part of the GMSS.
Iridium also uses an Arizona-based access number to call Iridium phones for those unwilling or unable to call the usually expensive GMSS number directly.
[3] Thuraya has been assigned +882-16, within the +882 range for International Networks.