044 is not a country code. Numbers inside a country start like this: Kyiv City (Ukraine), Ucom (Armenia), Aztelekom (Azerbaijan), Chennai, Tamil Nadu (India) 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 |
|---|---|---|
 Kyiv City · Ukraine | +380 44 … | 044 … |
 Ucom · Armenia | +374 44 … | 044 … |
 Aztelekom · Azerbaijan | +994 44 … | 044 … |
 Chennai, Tamil Nadu · India | +91 44 … | 044 … |
 Buri Ram/Chaiyaphum/Nakhon Ratchasima/Surin · Thailand | +66 44 … | 044 … |
 Zurich · Switzerland | +41 44 … | 044 … |
 Águas de Jurema - PR · Brazil | +55 44 … | 044 … |
| Alto Alegre - PR · Brazil | +55 44 … | 044 … |
| Alto Paraíso - PR · Brazil | +55 44 … | 044 … |
| 71 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.