FoneFinder.net is an excellent resource to search information relating to telephone prefixes and area codes. This online tool allows you to search information about a phone number based on its prefix. It also allows you to search area codes and prefixes based on a specific city or zip code.
Searching by just the area code provides a list of all prefixes associated with that area code, the region that uses each prefix, and the telecommunications company that issues the prefix with an embedded hyperlink that directs you to its website.
FoneFinder users also can search an entire phone number to access information about what carrier the phone number belongs to and the region where the phone number was issued.