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Area code lookup for all US cities or use the area codes locator to find which city a phone area code belongs to.

AreaCode.org lists US and Canada telephone area codes for reverse area code lookup. Find area code list, area code maps, and cities within an area code.

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Lookup US area codes, international country calling codes and world city

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Find the international dialing code or time zone for any country. Online tool will instantly show you ALL telephone prefixes needed to call from one area code to another. Add the tool to your own site for quick access.

Locator for telephone area codes in the USA, Canada and some Caribbean Islands; lookup cities in an area code and viceversa - detailed information on all codes including map and time zone/curent time

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United States Zip Codes provides a free zip code map and list of zip codes by state. Find zip codes by address, zip codes by city, or zip codes by state and compare shipping rates for USPS, UPS, and FedEx.