0375 is not a country code. Numbers inside a country start like this: Zwickau (Germany), Pingdingshan, Henan (China), Golem/Grabian/Remas, Lushnjë (Albania), Concession (Zimbabwe). 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 |
|---|---|---|
 Zwickau · Germany | +49 375 … | 0375 … |
 Pingdingshan, Henan · China | +86 375 … | 0375 … |
 Golem/Grabian/Remas, Lushnjë · Albania | +355 375 … | 0375 … |
 Concession · Zimbabwe | +263 375 … | 0375 … |
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.