What the international code for North Korea to call? Dial code number to open phone call in North Korea is ( 00850 ) or ( +850 ) in order to make international phone calls between North Korea and all countries of the world to unlock phone with more additional details and informations about North Korea country whereby each country is distinguished by a special telephone number, where the caller write the Democratic People's Republic of North Korea dial area code to opening sim card telephone line mobile or landline then the phone number.