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Document Name:  NPA Allocation Plan and Assignment Guidelines
Document Date:  January, 2016
Document Number:  ATIS-0300055
Document Version: 
Committee:  INC
Collaborating Forum(s): 
Document Type:  Guidelines
Abstract:  This document specifies guidelines for the assignment of Numbering Plan Area (NPA) codes. NPA codes are the first three digits of the 10-digit North American Numbering Plan (NANP) format (the format is made up of 10 digits in the form of NXX-NXX-XXXX). NPA codes have traditionally been used to identify distinct exclusive geographic areas, commonly referred to as area codes.
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File Size: 
Number of Pages:  0
 
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