the entire directory only in Resources/Numbering

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See also:

• Business: Telecommunications: Regulation (74)
• Reference: Directories: Address and Phone Numbers: Area Codes (21)

• 800 Service Management System - Information about the central database for US toll free number management.
• International Numbering Plans - A collection of all international numbering plans in the world. Some features require a paid subscription.
• The Telephone Exchange Name Project - The historical relationship between North American telephone exchange names and numbers.

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