Country Code: +39 06 698
International Call Prefix: 00
Trunk Prefix: Leading 0 is dialled both within and from outside Italy
Telephone numbers in Vatican City are integrated into the Italian telephone numbering plan. A Vatican telephone number is in the form of 06 698x xxxx, which is in the numbering range for Rome (06). As Italy switched to a closed dialing plan, all calls within Italy, Vatican City and San Marino must always be dialled with their full ten digits, including the leading zero.
ITU-T assigns country code +379 to Vatican City. However, Vatican City is still reached via the Italian telephone numbering plan with country code +39.
06 698x xxxx (Vatican City from Italy)
+39 06 698x xxxx (Vatican City from rest of the world via Italy)
+379 698x xxxx (Vatican City direct from rest of the world)