0573 is not a country code. Numbers inside a country start like this: Jiaxing, Zhejiang (China), Lochem (Netherlands), Sukth, Durrës (Albania), Ena, Gifu (Japan) 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 |
|---|---|---|
 Jiaxing, Zhejiang · China | +86 573 … | 0573 … |
 Lochem · Netherlands | +31 573 … | 0573 … |
 Sukth, Durrës · Albania | +355 573 … | 0573 … |
 Ena, Gifu · Japan | +81 573 … | 0573 … |
| Nakatsugawa, Gifu · Japan | +81 573 … | 0573 … |
 Årjäng · Sweden | +46 573 … | 0573 … |
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.