How to Make International Telephone Calls

To make international phone calls a user must know the receiving countries International Direct Dialing (IDD) code and the country code for that country, in addition to the area code and telephone number. First the user would dial the IDD code, then the country code, then the area code (if any), and last the phone number is dialed.

So, to call Mexico from the U.S. the user must dial: 01152 and then the area code and phone number, or to call the U.S. from Mexico the user would dial 981 and then the area code and phone number. For example, if a user wanted to call Time & Temperature in Lawrenceburg, TN, USA from Taiwan they would dial 00219317627888.