A list of area codes and telephone prefixes can be obtained at TheDirectory.org. The website of the North American Numbering Plan Administration provides area code information from the regions it regulates, and CountryCode.org lists area codes from around the world and provides information regarding making international calls.
To get a list of area codes and their corresponding prefixes, visit TheDirectory.com. The website includes prefixes, area codes and other helpful location information. This directory arranges its list of area codes numerically and by states and countries in alphabetical order.
The North American Numbering Plan Administration (NANPA) is the official organization charged with the allocation of area codes in United States and 19 other North American and Caribbean countries. The official website of the organization provides users with information on the areas it covers and their allocated codes. The site uses maps to display information and serves as a good resource to find area codes in the United States, Canada and other parts of North America and the Caribbean.
Visitors can get a list of area codes from much of the world at Countrycode.org. The site also contains information about international calls, instructing users about the international dialing prefixes needed when making a call from one country to another.