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List of US area codes for each state, with a list of important cities and towns in each of the telephone area codes. Provides good information on overlays and splits.
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Lists international dialing codes, area codes, weather, world time and currency exchange rates. Also has a reverse phone number lookup tool.
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Lists of exchanges that have moved or are moving from one North American area code to another.
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Online tool that builds dialing codes based on locations selected. Includes many international dialing codes and some area codes. Also has a reverse phone number lookup tool and current time.
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Online tool that build dialing codes based on locations selected. Lists many international dialing codes and some area codes.
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Find international dialing codes and area codes by specifying location. Information on direct dial prefixes. Flash user interface.
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Listing of international dialing codes and area codes with instructions.
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The Federal Communications Commission answers frequently asked questions regarding area codes in the US.
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Calling guide for United States and Canadian residents listing international country and city codes, phone books and time zones.
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International and national direct dialing prefixes and instructions.
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Information about North American area codes, featuring changes, historical data and area code map. Detailed information on overlays and splits.
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Databases for sale providing data on area codes and telephone exchange prefixes in the North American Numbering Plan.
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Find North American codes by a map, number, or location. Includes information on future planned area codes and a free downloadable area code database.
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Displays the current time, international dialing code, area codes and currency converter for almost anywhere. Includes instructions on country codes and international dialing code parts usage.
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International dialing codes for almost any country and area codes for many cities. The interface includes a dropdown selector and local times are provided with dialing codes.
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A directory of telephone STD dialing codes in the UK.
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Returns area information, map, BT charge information, and nearby exchange names for telephone numbers, access/short codes, or the name of a location.
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Information about US-based area codes and prefixes. Find the city, carrier, location, and more information about any phone number with this free service.
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Area code lookup for the United States with maps. Search by state or by code.
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Provides a list of towns and cities covered by each US area code including overlays and splits.
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Find United States area code by city and state, Find City and State by area code.
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Find the major locations in a certain area code by entering the area code, or find the area codes that are used in a certain state by entering the state name.
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Contains world telephone codes and time zone information. Search by city, country or number.
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Lists and links to current international dialing codes and area codes with formatting guides and provides information on recent and historical changes.
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Includes all cities of Russia, Ukraine, Belorussia, Moldova, Lithuania, Latvia, Estonia, Kazakhstan, Georgia, Uzbekistan, Azerbaijan, Armenia, Kirgizia, and Tadjikistan.
