The country code prefix for calling Kosovo is +377 44 / 45 +386 43 / 49 +381 28 / 29 / 38 / 39.
To make an international phone call, you should dial: "exit code of your country" + "country code of the country you are dialing to" + "the phone number you want to call".
For example: To call Kosovo from the USA or Canada, dial: "011 +377 44 / 45 +386 43 / 49 +381 28 / 29 / 38 / 39 + phone number"(011 is the Exit code of the USA)