What the international code for Belize to call? Dial code number to open phone call in Belize is ( 00501 ) or ( +501 ) in order to make international phone calls between Belize and all countries of the world to unlock phone with more additional details and informations about Belize country whereby each country is distinguished by a special telephone number, where the caller write the Belize dial area code to opening sim card telephone line mobile or landline then the phone number.