What the international code for Gambia to call? Dial code number to open phone call in Gambia is ( 00220 ) or ( +220 ) in order to make international phone calls between Gambia and all countries of the world to unlock phone with more additional details and informations about Gambia country whereby each country is distinguished by a special telephone number, where the caller write the Republic of the Gambia dial area code to opening sim card telephone line mobile or landline then the phone number.