865 is not a country code. Numbers inside a country start like this: TM-Cell (Turkmenistan). The first digit 8 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 |
|---|---|---|
 TM-Cell · Turkmenistan | +993 65 … | 865 … |
| Area or operator | From abroad | Inside the country |
|---|---|---|
 Stavropol Territory · Russia | +7 865 … | 8865 … |
 Bean Station, TN · United States | +1 865 … | 1865 … |
| Clinton, TN · United States | +1 865 … | 1865 … |
| Dandridge, TN · United States | +1 865 … | 1865 … |
| 20 more in United States | ||
 Gorë/Pirg/Moglicë, Korçë · Albania | +355 865 … | 0865 … |
 Kamogata, Okayama · Japan | +81 865 … | 0865 … |
| Kasaoka, Okayama · Japan | +81 865 … | 0865 … |
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.