0258 is not a country code. Numbers inside a country start like this: Telenesti (Moldova), Denizli (Türkiye), Nagaoka, Niigata (Japan), Alba (Romania) 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 |
|---|---|---|
 Telenesti · Moldova | +373 258 … | 0258 … |
 Denizli · Türkiye | +90 258 … | 0258 … |
 Nagaoka, Niigata · Japan | +81 258 … | 0258 … |
 Alba · Romania | +40 258 … | 0258 … |
 Furudal · Sweden | +46 258 … | 0258 … |
 Cojedes · Venezuela | +58 258 … | 0258 … |
 Khanh Hoa Province · Vietnam | +84 258 … | 0258 … |
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.