• ATIS 0300119(2022-07)

ATIS 0300119(2022-07)

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

The Alliance for Telecommunications Industry Solutions, 07/01/2022

Publisher: ATIS

File Format: PDF

$125.00$251.58


Published:01/07/2022

File Size:1 file , 5.7 MB

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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