077 is not a country code. Numbers inside a country start like this: Kyivstar (Ukraine), VivaCell-MTS (Armenia), Chumphon/Ranong/Surat Thani (Thailand), Venlo (Netherlands) 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 |
|---|---|---|
 Kyivstar · Ukraine | +380 77 … | 077 … |
 VivaCell-MTS · Armenia | +374 77 … | 077 … |
 Chumphon/Ranong/Surat Thani · Thailand | +66 77 … | 077 … |
 Venlo · Netherlands | +31 77 … | 077 … |
 BeeOne Communications · Switzerland | +41 77 … | 077 … |
| In&Phone · Switzerland | +41 77 … | 077 … |
| Lycamobile · Switzerland | +41 77 … | 077 … |
| 3 more in Switzerland | ||
 Abaíra - BA · Brazil | +55 77 … | 077 … |
| Anagé - BA · Brazil | +55 77 … | 077 … |
| Angical - BA · Brazil | +55 77 … | 077 … |
| 67 more in Brazil | ||
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.