Look up the international direct dialing code of the country you are calling from using a country code list. Write the international direct dialing code down on a piece of paper. This code allows you to dial outside of the country you are calling from. In the United States, the code is 011.
Use the country code list to look up the country code of the country you are calling. Following the international direct dial code, write down the country code on the piece of paper. If you are placing a call to the United Kingdom, the country code is 44.
Look up the city or area code using a country code list. Following the country code, write the city or area code down on the piece of paper. If you are placing a call to Belfast, the city code is 2890.
Write down the telephone number of the person you are calling.
Dial the sequence of numbers written on the paper: the international direct dialing code + country code + city code + local number. For example, if you were calling Belfast from the United States, you would dial 011 44 2890 followed by the telephone number of the person you were calling.
