0997 is not a country code. Numbers inside a country start like this: Akesu, Xinjiang (China), Naze, Kagoshima (Japan), Mansehra/Batagram (Pakistan), Claro (Peru) 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 |
|---|---|---|
 Akesu, Xinjiang · China | +86 997 … | 0997 … |
 Naze, Kagoshima · Japan | +81 997 … | 0997 … |
| Setouchi, Kagoshima · Japan | +81 997 … | 0997 … |
| Tokunoshima, Kagoshima · Japan | +81 997 … | 0997 … |
| 1 more in Japan | ||
 Mansehra/Batagram · Pakistan | +92 997 … | 0997 … |
 Claro · Peru | +51 997 … | 0997 … |
 Globe · Philippines | +63 997 … | 0997 … |
 MTN · South Sudan | +211 997 … | 0997 … |
 G-Mobile · Vietnam | +84 997 … | 0997 … |
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.