---
title: "NNACL Files"
slug: "nnacl-files"
updated: 2026-07-22T13:04:57Z
published: 2026-08-10T20:23:40Z
canonical: "help.idibilling.com/nnacl-files"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.idibilling.com/llms.txt
> Use this file to discover all available pages before exploring further.

# NNACL Files

The NPANXX Active Code List (NNACL) is published quarterly by Telcordia. It contains all the active NPANXX codes as of the last day of the preceding month in which it is published. This list consists of eight files which must be processed together. The NNACL files have a naming convention of NNACLX where X is 2 – 9 representing the first number of the NPA.

**See**:

[Importing NNACL Files](/v1/docs/importing-nnacl-files)

[Viewing the NNACL Table](/v1/docs/viewing-the-nnacl-table)

[Modifying the NNACL table](/v1/docs/modifying-the-nnacl-table)

See also:

[Updating the NNACL Table with New NNAG Information](/v1/docs/updating-the-nnacl-table)

[Importing NNAG Files](/v1/docs/importing-nnag-files)

[About Importing NNAG and NNACL Files](/v1/docs/about-importing-nnag-and-nnacl-files)