Mapquest Prefix Look-up

Everyone knows how to look up area codes and where they are at. But now I am interested in finding information about Prefixs, the middle three number in your phone number. http://areacodes.langenberg.com/ This has good resourses for it, then they come up via Mapquest. I am wondering if it is possible to find infromation striaght from mapquest, if there is an input field to look them up directly. Or if there is any other Prefix look ups at.