What the international code for Greenland to call? Dial code number to open phone call in Greenland is ( 00299 ) or ( +299 ) in order to make international phone calls between Greenland and all countries of the world to unlock phone with more additional details and informations about Greenland country whereby each country is distinguished by a special telephone number, where the caller write the Greenland dial area code to opening sim card telephone line mobile or landline then the phone number.