0915 is not a country code. Numbers inside a country start like this: Ankang, Shaanxi (China), Bula (Indonesia), Glo (Nigeria), Claro (Peru) and others. The first digit 0 is the trunk prefix for domestic calls and is dropped from abroad.
Have the full number? Check it in the number lookup.
| Area or operator | From abroad | Inside the country |
|---|---|---|
 Ankang, Shaanxi · China | +86 915 … | 0915 … |
 Bula · Indonesia | +62 915 … | 0915 … |
 Glo · Nigeria | +234 915 … | 0915 … |
 Claro · Peru | +51 915 … | 0915 … |
 Globe · Philippines | +63 915 … | 0915 … |
 Orange · Slovakia | +421 915 … | 0915 … |
 Bastuträsk · Sweden | +46 915 … | 0915 … |
 FarEasTone · Taiwan | +886 915 … | 0915 … |
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.