Find international dialing codes and area codes by specifying location. Information on direct dial prefixes. Flash user interface.

Calling guide for United States and Canadian residents listing international country and city codes, phone books and time zones.

Information about North American area codes, featuring changes, historical data and area code map. Detailed information on overlays and splits.

Databases for sale providing data on area codes and telephone exchange prefixes in the North American Numbering Plan.

Displays the current time, international dialing code, area codes and currency converter for almost anywhere. Includes instructions on country codes and international dialing code parts usage.

A directory of telephone STD dialing codes in the UK.

Returns area information, map, BT charge information, and nearby exchange names for telephone numbers, access/short codes, or the name of a location.

Area code lookup for the United States with maps. Search by state or by code.

Provides a list of towns and cities covered by each US area code including overlays and splits.

Lists and links to current international dialing codes and area codes with formatting guides and provides information on recent and historical changes.