NPA Allocation Plan and Assignment Guidelines

Publisher:
The Alliance for Telecommunications Industry Solutions

Document status:

Active

Format:

Electronic (PDF)

Delivery time:

10 minutes

Delivery time (for Russian version):

200 business days

SKU:

Reissued with the resolution of issue 680.

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 :	11/12/2010

ATIS 0300055 PDF

NPA Allocation Plan and Assignment Guidelines

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