0791 is not a country code. Numbers inside a country start like this: Moldcell (Moldova), Schwäbisch Hall (Germany), Nanchang, Jiangxi (China), Meherpur (Bangladesh) 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 |
|---|---|---|
 Moldcell · Moldova | +373 791 … | 0791 … |
 Schwäbisch Hall · Germany | +49 791 … | 0791 … |
 Nanchang, Jiangxi · China | +86 791 … | 0791 … |
 Meherpur · Bangladesh | +880 791 … | 0791 … |
 Zain · Iraq | +964 791 … | 0791 … |
 Aioi, Hyogo · Japan | +81 791 … | 0791 … |
 Globally Advanced Integrated Networks Ltd · Malawi | +265 791 … | 0791 … |
 Vodacom · Tanzania | +255 791 … | 0791 … |
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.