0511 is not a country code. Numbers inside a country start like this: MagtiCom (Georgia), Hannover (Germany), Zhenjiang, Jiangsu (China), Veenwouden (Netherlands) 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 |
|---|---|---|
 MagtiCom · Georgia | +995 511 … | 0511 … |
| Silknet · Georgia | +995 511 … | 0511 … |
 Hannover · Germany | +49 511 … | 0511 … |
 Zhenjiang, Jiangsu · China | +86 511 … | 0511 … |
 Veenwouden · Netherlands | +31 511 … | 0511 … |
 Kruje · Albania | +355 511 … | 0511 … |
 Banjarmasin · Indonesia | +62 511 … | 0511 … |
 Skara-Götene · Sweden | +46 511 … | 0511 … |
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.