ATIS 0300076(2008-12)

This technical document seeks to document the format and values of telephone numbers in the United States portion of the NANP, thereby coining a ¿United States Numbering Plan¿ and a ¿United States Dialing Plan.¿ It further defines the other telecommunications industry uses of numbers and describes these uses in the United States. The NANP exists under Country Code 1, shared among 19 countries, under the International Telecommunication Union (ITU) Recommendation E.164, “The international public telecommunication numbering plan” (Rec. E.164).