To find an phone area code, use either AllAreaCodes.com or 411.com. AllAreaCodes.com can determine the location of a particular area code, while 411.com uses a location to determine an area code.Continue Reading
AllAreaCodes.com has a list of area codes on the right-hand side of its home page. Click on any three-digit group, beginning with 200 and ending with 900, to see area codes and their associated locations. Click on the actual area code to bring up a map of the coverage area.
To use 411.com, scroll down to Searches on the homepage and choose Area Codes. In the box that appears, type in the location you need an area code for, such as "Chicago," and information for any associated area codes in Chicago will be listed.Learn more about Public Records