Cart 0 Product Products (empty)
No products
To be determined Shipping
$0.00 Total
Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart. There is 1 item in your cart.
Total products
Total shipping To be determined
Total
New 
View larger
View larger 
ATIS 0300119(2022-04)
M00004323
New product
ATIS 0300119(2022-04) Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines
standard by The Alliance for Telecommunications Industry Solutions, 04/01/2022
In stock
More info
Full Description
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).