What the international code for Trinidad and Tobago to call? Dial code number to open phone call in Trinidad and Tobago is ( 001868 ) or ( +1868 ) in order to make international phone calls between Trinidad and Tobago and all countries of the world to unlock phone with more additional details and informations about Trinidad and Tobago country whereby each country is distinguished by a special telephone number, where the caller write the Republic of Trinidad and Tobago dial area code to opening sim card telephone line mobile or landline then the phone number.