0987 is not a country code. Numbers inside a country start like this: Nichinan, Miyazaki (Japan), Tigo (Paraguay), Globe (Philippines), Digitel (South Sudan) 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 |
|---|---|---|
 Nichinan, Miyazaki · Japan | +81 987 … | 0987 … |
 Tigo · Paraguay | +595 987 … | 0987 … |
 Globe · Philippines | +63 987 … | 0987 … |
 Digitel · South Sudan | +211 987 … | 0987 … |
 Taiwan Mobile · Taiwan | +886 987 … | 0987 … |
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.