0366 is not a country code. Numbers inside a country start like this: Adigeni (Georgia), Kastamonu (Türkiye), Poshnjë/Kutalli, Berat (Albania), Klungkung/Bangli (Indonesia) 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 |
|---|---|---|
 Adigeni · Georgia | +995 366 … | 0366 … |
 Kastamonu · Türkiye | +90 366 … | 0366 … |
 Poshnjë/Kutalli, Berat · Albania | +355 366 … | 0366 … |
 Klungkung/Bangli · Indonesia | +62 366 … | 0366 … |
 Harghita · Romania | +40 366 … | 0366 … |
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.