Area Code Lookup: Find area code to a region or particular city.
Area Codes: Lists area codes and corresponding time zone accessible from the U.S.
Area Codes and Country Guides: Complete listing of country, city and area phone codes.
Area Codes Listing: Lists North American area codes by number, region and time zone.
AreaCodeSearchEngine.com: Area code lookup with maps by state or by code.
AskYP - Area Code: Find area code by city and state and find city and state by area code.
CE Service Area Code Changes: Lists of exchanges that have moved or are moving from one North American area code to another.
Country Code Lists: Provides international codes for all countries and major cities.
Dial Me: The UK's directory of telephone STD dialing codes.
Dial-a-Code.com: Country, area and city codes and IDD (international direct dialing) prefixes.
Dialcodesplus: Listing of international dialing codes, prefixes and instructions.
exUSSR Phone Codes: Includes all cities of Russia, Ukraine, Belorussia, Moldova, Lithuania, Latvia, Estonia, Kazakhstan, Georgia, Uzbekistan, Azerbaijan, Armenia, Kirgizia, and Tadjikistan.
FAQs on Area Codes from FCC: The Federal Communications Commission answers frequently asked questions regarding area codes.
Fone Finder: Cross reference by area code and exchange to determine the telephone company and place name.
International Calling Codes: Listing of international telephone country and city codes.
International Dialing Codes: International and national direct dialing prefixes and instructions.
Interworldcodes: International telephone dialing country and city codes directory.
Islands Philippines - Philippine Telephone Area Codes: Provides a list of telephone codes for Philippine cities, destinations and provinces.
LincMad: Information about North American area codes, featuring changes and historical data.
North American Numbering Plan Administration: Area Codes: Find North American codes by a map, number, or location.
NPA NXX Source: Complete coverage of all area codes and telephone exchange prefixes in the North American Numbering Plan.
Quick Area Code Finder: Offers pulldown menus to lookup by city or area code.
Switchboard - Area Code: Find area code by city and state, Find City and State by area code.
UK Phone Information: Returns area information, map, BT charge information, and nearby exchange names for telephone numbers, access/short codes, or the name of a location.
US Area Codes: Unites States area codes directory and lookup tool.
Verizon - Area Code Lookup: 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.
World Search Dial Codes: Contains telephone codes and time zone information.