To call to Vatican use the international country calling code +39 followed by the national phone number you want to call. Vatican is located in Europe and uses Euro. It has around 451 inhabitants, 0 landlines and 0 cell phone users.
The country code +39 indicates that the phone number you are about to dial is to Vatican in Europe. Before you call to Vatican you should be aware of that they speak Latin, Italian, French. You can see the exact location of this country code on the maps below.