AreaCode.org is a handy site when you’re trying to figure out where that guy who left the phone message is calling from. Or when you get an e-mail inquiry from someone who lists his phone number but not his address. Here’s the description from the site:
AreaCode.org is an area codes locator and comprehensive directory of area codes across the United States. Find information on each area code, including coverage area and local dialing instructions. Coverage area is shown with an area code map and list of cities within each code. Other relevant information for telephone area codes is detailed in the comments section. Use AreaCode.org for area code lookup, area code search, and as an area code finder. You could say that AreaCode.org takes the code out of telephone area code.