| Area Code Lookup: Find area code to a region or particular city. |
| Area Codes: Lists area codes and corresponding time zone accessible from the U.S. |
| Area Codes and Country Guides: Complete listing of country, city and area phone codes. |
| Area Codes Listing: Lists North American area codes by number, region and time zone. |
| AreaCodeSearchEngine.com: Area code lookup with maps by state or by code. |
| AskYP - Area Code: Find area code by city and state and find city and state by area code. |
| CE Service Area Code Changes: Lists of exchanges that have moved or are moving from one North American area code to another. |
| Country Code Lists: Provides international codes for all countries and major cities. |
| Dial Me: The UK's directory of telephone STD dialing codes. |
| Dial-a-Code.com: Country, area and city codes and IDD (international direct dialing) prefixes. |
| Dialcodesplus: Listing of international dialing codes, prefixes and instructions. |
| exUSSR Phone Codes: Includes all cities of Russia, Ukraine, Belorussia, Moldova, Lithuania, Latvia, Estonia, Kazakhstan, Georgia, Uzbekistan, Azerbaijan, Armenia, Kirgizia, and Tadjikistan. |
| FAQs on Area Codes from FCC: The Federal Communications Commission answers frequently asked questions regarding area codes. |
| Fone Finder: Cross reference by area code and exchange to determine the telephone company and place name. |
| International Calling Codes: Listing of international telephone country and city codes. |
| International Dialing Codes: International and national direct dialing prefixes and instructions. |
| Interworldcodes: International telephone dialing country and city codes directory. |
| Islands Philippines - Philippine Telephone Area Codes: Provides a list of telephone codes for Philippine cities, destinations and provinces. |
| LincMad: Information about North American area codes, featuring changes and historical data. |
| North American Numbering Plan Administration: Area Codes: Find North American codes by a map, number, or location. |
| NPA NXX Source: Complete coverage of all area codes and telephone exchange prefixes in the North American Numbering Plan. |
| Quick Area Code Finder: Offers pulldown menus to lookup by city or area code. |
| Switchboard - Area Code: Find area code by city and state, Find City and State by area code. |
| UK Phone Information: Returns area information, map, BT charge information, and nearby exchange names for telephone numbers, access/short codes, or the name of a location. |
| US Area Codes: Unites States area codes directory and lookup tool. |
| Verizon - Area Code Lookup: Find the major locations in a certain area code by entering the area code, or find the area codes that are used in a certain state by entering the state name. |
| World Search Dial Codes: Contains telephone codes and time zone information. |
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