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Numbering (4) See Also:
Sites:
» 800 Service Management System
Information about the central database for US toll free number management. http://www.sms800.com/ » Area Code Information
Detailed information on the history and current developments in North American NPA allocations. http://www.areacode-info.com/ » International Numbering Plans
A collection of all international numbering plans in the world. Some features require a paid subscription. http://www.numberingplans.com/ » The Telephone Exchange Name Project
The historical relationship between North American telephone exchange names and numbers. http://ourwebhome.com/TENP/TENproject.html This category needs an editor
Last Updated: 2007-01-02 17:49:35
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