---
title: "Extension Number Container"
slug: "extension-number-container"
updated: 2025-12-15T19:59:35Z
published: 2025-12-15T19:59:35Z
canonical: "docs.natterbox.com/extension-number-container"
---

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

# Extension Number Container

| Available in the Call Policy? | Available in the Data Analytics Policy? | Available in the Digital Policy? | Available in the System Policy? |
| --- | --- | --- | --- |
| ✔ | ✖ | ✖ | ✔ |

Purpose: Routing calls internally via 4 digit extensions (2000-7999)

Location: ‘Click here to START’ box

![](https://cdn.document360.io/c81c490c-daaa-4ebd-a3c3-1a2dee8b7617/Images/Documentation/Screenshot 2025-12-15 at 19.46.54.png?sv=2026-02-06&spr=https&st=2026-10-12T06%3A01%3A03Z&se=2026-10-12T07%3A01%3A03Z&sr=c&sp=r&sig=RO1TQbljmA8YXFMPOzxhM8HA3wJuhGUIyA5k30Uofng%3D)

Appearance: ![](https://cdn.document360.io/c81c490c-daaa-4ebd-a3c3-1a2dee8b7617/Images/Documentation/17.6.-extension-number-container-image-m4nrc6kg.png?sv=2026-02-06&spr=https&st=2026-10-12T06%3A01%3A03Z&se=2026-10-12T07%3A01%3A03Z&sr=c&sp=r&sig=RO1TQbljmA8YXFMPOzxhM8HA3wJuhGUIyA5k30Uofng%3D)

#### Use Cases

- [Transfer calls internally to another call queue](/v1/docs/how-to-transfer-into-a-call-queue)
- Take calls to a [post call survey](/v1/docs/how-to-set-up-a-post-call-survey)

### Configuration

You can choose any numbers between 2000-7999 that is not being used anywhere else. For example assigned as a user extension or group extension.