0877 is not a country code. Numbers inside a country start like this: Yuxi, Yunnan (China), Tirupathi, Andhra Pradesh (India), Dishnicë/Sukë/Ballaban, Përmet (Albania), XL (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 |
|---|---|---|
 Yuxi, Yunnan · China | +86 877 … | 0877 … |
 Tirupathi, Andhra Pradesh · India | +91 877 … | 0877 … |
 Dishnicë/Sukë/Ballaban, Përmet · Albania | +355 877 … | 0877 … |
 XL · Indonesia | +62 877 … | 0877 … |
 Marugame, Kagawa · Japan | +81 877 … | 0877 … |
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.