05 is not a country code. Numbers inside a country start like this: Vilnius (Lithuania), etecsa (Cuba), Kymi (Finland), Balqa (Jordan) 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 |
|---|---|---|
 Vilnius · Lithuania | +370 5 … | 05 … |
 etecsa · Cuba | +53 5 … | 05 … |
 Kymi · Finland | +358 5 … | 05 … |
 Balqa · Jordan | +962 5 … | 05 … |
| Madaba · Jordan | +962 5 … | 05 … |
| Zarqa · Jordan | +962 5 … | 05 … |
 Agadir · Morocco | +212 5 … | 05 … |
| Agadir/Ait Meloul/Inezgane · Morocco | +212 5 … | 05 … |
| Agadir/Es-Semara/Tarfaya · Morocco | +212 5 … | 05 … |
| 50 more in Morocco | ||
 Hamhung · North Korea | +850 5 … | 05 … |
| Wonsan · North Korea | +850 5 … | 05 … |
 Gorica/Koper/Postojna · Slovenia | +386 5 … | 05 … |
 Chiayi/Yunlin · Taiwan | +886 5 … | 05 … |
 Hadhrmout · Yemen | +967 5 … | 05 … |
| Shabwah · Yemen | +967 5 … | 05 … |
| Soqatrah · Yemen | +967 5 … | 05 … |
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.