NANPA Area Code Maps
Clickable map of the U.S. with detailed state-by-state area code information. Select a state from the map, or by alphabetized list. Updated by Tele Atlas.
www.nanpa.com

Fone Finder
Identifies the city associated with a specific area code and prefix. Also identifies international country codes and the geographical location of the telephone.
www.fonefinder.net

Area Code Listing, by Number
Search U.S. and international area codes by number to find what major cities the area code contains. Also find links to other area code resources.
www.bennetyee.org

Area Codes on AnyWho
Anywho provides an extensive list of area codes across the United States for all important cities and towns. ... relates to the implementation of US area codes.
www.anywho.com

Area Code Directory - Addresses.com
Look up area codes by states and cities. Also includes ZIP codes, time zones, and links to local white and yellow pages.
areacodes.addresses.com

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.
decoder.americom.com

Telephone numbering plan - Wikipedia, the free encyclopedia
Area codes were assigned based on the length of time a rotary dial phone took to ... Generally the area codes determine the cost of a call.
en.wikipedia.org

Area Code Lookup | WhitePages
WhitePages area code lookup! Find area codes for US cities and states. ... Most Searched US Area Codes. 201 New Jersey. 202 Washington DC. 203 Connecticut. 205 Alabama ...
www.whitepages.com

All Area Codes
Directory of U.S. area codes by state plus cities within each area code. Also lists Canadian area codes by province or territory.
www.allareacodes.com

Area Codes Lookup
Look up U.S. area codes and ZIP codes, or find postal and phone information for a town, city, or county.
www.area-codes.com