ATIS 0300119(2020-07)

Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines

The Alliance for Telecommunications Industry Solutions, 07/01/2020

Publisher: ATIS

File Format: PDF

$136.00$273.54

Description

Published:01/07/2020

This document specifies guidelines for the administration and assignment of Central Office (CO) Codes (NPA-NXX) and Thousands-Blocks (NPA-NXX-Xs) to Local Number Portability (LNP)-capable Service Provider (SPs) within geographic numbering plan areas (NPAs).

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