What the international code for Mauritania to call? Dial code number to open phone call in Mauritania is ( 00222 ) or ( +222 ) in order to make international phone calls between Mauritania and all countries of the world to unlock phone with more additional details and informations about Mauritania country whereby each country is distinguished by a special telephone number, where the caller write the Islamic Republic of Mauritania dial area code to opening sim card telephone line mobile or landline then the phone number.