What the international code for Jersey to call? Dial code number to open phone call in Jersey is ( 0044 ) or ( +44 ) in order to make international phone calls between Jersey and all countries of the world to unlock phone with more additional details and informations about Jersey country whereby each country is distinguished by a special telephone number, where the caller write the Bailiwick of Jersey dial area code to opening sim card telephone line mobile or landline then the phone number.