What the international code for Congo to call? Dial code number to open phone call in Congo is ( 00243 ) or ( +243 ) in order to make international phone calls between Congo and all countries of the world to unlock phone with more additional details and informations about Congo country whereby each country is distinguished by a special telephone number, where the caller write the Democratic Republic of the Congo dial area code to opening sim card telephone line mobile or landline then the phone number.