NPA Allocation Plan and Assignment Guidelines

Publisher:
The Alliance for Telecommunications Industry Solutions

Document status:

Active

Format:

Electronic (PDF)

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10 minutes

Delivery time (for Russian version):

200 business days

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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.

Number of Pages :	27
Published :	09/17/2010

ATIS 0300055 PDF

NPA Allocation Plan and Assignment Guidelines

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