Name:
ATIS 0300119(2021-07) PDF
Published Date:
07/01/2021
Status:
Active
Publisher:
The Alliance for Telecommunications Industry Solutions
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).
| File Size : | 1 file , 5.6 MB |
| Published : | 07/01/2021 |