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| Area or operator | From abroad | Inside the country |
|---|---|---|
 MegaFon · Russia | +7 991 … | 8991 … |
| T2 · Russia | +7 991 … | 8991 … |
 Deggendorf · Germany | +49 991 … | 0991 … |
 Urumchi, Xinjiang · China | +86 991 … | 0991 … |
| Urumqi, Xinjiang · China | +86 991 … | 0991 … |
 Airtel · Congo - Kinshasa | +243 991 … | 0991 … |
 IR-MCI · Iran | +98 991 … | 0991 … |
 Airtel · Malawi | +265 991 … | 0991 … |
 Claro · Paraguay | +595 991 … | 0991 … |
 Claro · Peru | +51 991 … | 0991 … |
 Dito · Philippines | +63 991 … | 0991 … |
If a number starts with +, the first 1–3 digits are the country code. If it starts with 0 (8 in Russia and Kazakhstan), it is a domestic number: an area or operator code follows, and from abroad the 0 or 8 is replaced with + and the country code. The same digits can mean different places, so where the call came from matters.