086 is not a country code. Numbers inside a country start like this: AIS (Thailand), Agricolândia - PI (Brazil), Durbuy (Belgium), Alekovo, Silistra (Bulgaria). 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 |
|---|---|---|
 AIS · Thailand | +66 86 … | 086 … |
| DTAC · Thailand | +66 86 … | 086 … |
| True Move · Thailand | +66 86 … | 086 … |
 Agricolândia - PI · Brazil | +55 86 … | 086 … |
| Água Branca - PI · Brazil | +55 86 … | 086 … |
| Alto Longá - PI · Brazil | +55 86 … | 086 … |
| 66 more in Brazil | ||
 Durbuy · Belgium | +32 86 … | 086 … |
 Alekovo, Silistra · Bulgaria | +359 86 … | 086 … |
| Alfatar · Bulgaria | +359 86 … | 086 … |
| Aydemir · Bulgaria | +359 86 … | 086 … |
| 4 more in Bulgaria | ||
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.