Global Mobile Satellite System
The Global Mobile Satellite System (GMSS) consists of several satellite phone providers serving private customers. It can be compared to PLMN (wireless telephony carriers) and PSTN (traditional wire-based telephony).
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. (Inmarsat had already been allocated country code +870.) The next digit following the country code is allocated (two at a time) to a particular GMSS carrier:
| Carrier | GMSS codes |
|---|---|
| spare (formerly ICO) | +881 0 +881 1 |
| spare (formerly Ellipso) | +881 2 +881 3 |
| spare | +881 4 +881 5 |
| Iridium | +881 6 +881 7 |
| Globalstar | +881 8 +881 9 |
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