International Numbering Plans provides a variety of tools in the field of telecommunication for businesses, law enforcement agenncies, governmental organisations or regular users.

National Numbering Plans. Administrations are requested to notify ITU about their national numbering plan changes, or to give an explanation of their web page on ...

... ranges to countries, regions, areas and exchanges and to non-fixed telephone networks such as mobile phone networks. Dial plans should not be confused with numbering plans.

This site reaches over 148K monthly people, of which 14,957 (10%) are in the U.S. The site attracts a more educated, middle aged, slightly male slanted audience.