What the international code for Greece to call? Dial code number to open phone call in Greece is ( 0030 ) or ( +30 ) in order to make international phone calls between Greece and all countries of the world to unlock phone with more additional details and informations about Greece country whereby each country is distinguished by a special telephone number, where the caller write the Hellenic Republic Greece dial area code to opening sim card telephone line mobile or landline then the phone number.