0973 is not a country code. Numbers inside a country start like this: Tongren, Qinghai (China), Hita, Oita (Japan), Claro (Peru), Porjus (Sweden) 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 |
|---|---|---|
 Tongren, Qinghai · China | +86 973 … | 0973 … |
 Hita, Oita · Japan | +81 973 … | 0973 … |
| Kusu, Oita · Japan | +81 973 … | 0973 … |
 Claro · Peru | +51 973 … | 0973 … |
| Movistar · Peru | +51 973 … | 0973 … |
 Porjus · Sweden | +46 973 … | 0973 … |
 T Star · Taiwan | +886 973 … | 0973 … |
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.