What the international code for Sierra Leone to call? Dial code number to open phone call in Sierra Leone is ( 00232 ) or ( +232 ) in order to make international phone calls between Sierra Leone and all countries of the world to unlock phone with more additional details and informations about Sierra Leone country whereby each country is distinguished by a special telephone number, where the caller write the Republic of Sierra Leone dial area code to opening sim card telephone line mobile or landline then the phone number.