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North American Numbering Plan

Overview#

North American Numbering Plan (NANP) is the Telephone Numbering Plan implemented within the United States, United States Territories about 20 Countries in total.

North American Numbering Plan format may be summarized in the notation NPA-NXX-XXXX:

National Destination Code (NDC) when combined with the Subscriber Number (SN) - will constitute the National Significant Number of the international E.164-number for geographic areas.

More Information#

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