0335 is not a country code. Numbers inside a country start like this: Frankfurt (Oder) (Germany), Probolinggo (Indonesia), Vaslui (Romania). The first digit 0 is the trunk prefix for domestic calls and is dropped from abroad.
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| Area or operator | From abroad | Inside the country |
|---|---|---|
 Frankfurt (Oder) · Germany | +49 335 … | 0335 … |
 Probolinggo · Indonesia | +62 335 … | 0335 … |
 Vaslui · Romania | +40 335 … | 0335 … |
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.