AmeriCom Long Distance Area Decoder - Provides current information related to area codes, city codes, and country codes. Search by names or codes at the city, state, or country level.
AT&T City and Country Codes - Lists international dialing codes needed to make phone calls into other countries, as well as the codes for major cities within each country.
Country Calling Codes - Find the series of codes you need to make a phone call to or from anywhere by selecting the approriate countries and cities from the pull-down menus.
CountryCodes.com - Offers international calling codes and a simple interface.
Infobel World: International Dialing Codes - Choose a country from the drop-down menu to see the international calling codes for the whole nation and for its major cities.
International Telephone Dialing Codes - Find the international calling codes to make a phone call to another coutnry, or the dialing prefix used to make international calls from that country.
Wikipedia: List of Country Calling Codes - Encyclopedia article listing the different country calling codes used to make international telephone calls to specific countries.
Wikipedia: List of International Call Prefixes - Encyclopedia entry listing the international call prefixes used by particular countries to make international calls out of that country.
World Telephone Numbering Guide - Find international dialing codes, country codes, and information about telephone service worldwide.
