What the international code for Sri Lanka to call? Dial code number to open phone call in Sri Lanka is ( 0094 ) or ( +94 ) in order to make international phone calls between Sri Lanka and all countries of the world to unlock phone with more additional details and informations about Sri Lanka country whereby each country is distinguished by a special telephone number, where the caller write the Democratic Socialist Republic of Sri Lanka dial area code to opening sim card telephone line mobile or landline then the phone number.