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:[1][2]
| 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 |