0897 is not a country code. Numbers inside a country start like this: Ali/Pulan/Zhada, Tibet (China), Indosat Ooredoo Hutchison (Indonesia), Hakata, Ehime (Japan). 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 |
|---|---|---|
 Ali/Pulan/Zhada, Tibet · China | +86 897 … | 0897 … |
 Indosat Ooredoo Hutchison · Indonesia | +62 897 … | 0897 … |
 Hakata, Ehime · Japan | +81 897 … | 0897 … |
| Niihama, Ehime · Japan | +81 897 … | 0897 … |
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.