> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/cloud-telefonanlage/en/account-management/rufnummern-verwalten/wie-weise-ich-eine-durchwahl-zu.md).

# How do I assign an extension?

{% tabs %}
{% tab title="sipgate classic" %}
With an extension, all users in your account can reach each other without having to dial the full phone number of the respective user. You also need extensions for your users if you want to use presence display. For snom phones, you also need the extension to configure the busy lamp field[ busy lamp field.](https://help.sipgate.de/hc/de/articles/4403611171473/live_preview/01K6FVTRNS1EMQ5JJTDSBERDYM)

You can assign extensions if you are logged in as **Admin** admin. Users can have multiple internal extensions, but only one extension per routing.

**To assign an extension to a user:**

First open the **account management** and click the tile at the top left **Users.** Now select the desired **users** and then click **Edit** and then **Add extension.** Then add the desired extension.

{% hint style="info" %}
Important: For **mobile phones** internal extensions should always **be three- and four-digit** numbers.
{% endhint %}

Click **Save** and then in the overview on **Finish editing.**

**Assign extensions to groups**

To assign a phone number or an internal extension to a group, go to the [group overview](https://app.sipgate.com/groups) and select the desired group. Via Edit routing in Visual Routing you can add the desired extension.

**Account management → Groups → Select group → Edit routing → Phone number** and **Add extension**
{% endtab %}

{% tab title="sipgate neo" %}
Extensions for individual lines can only be assigned by **admins** of the account. As an admin, go in account management to the tile **users** and click the user to whom you want to assign an extension. In the user's personal routing, you will see the assigned phone number in the upper area and, to the right, the button for assigning an extension. Click the Extension button and enter the desired extension there. Please make sure that you assign each extension only once. By clicking on **Save** the extension is assigned to the corresponding user.

Extensions can also be assigned to **shared channels** To do this, go to the menu item **Channels** and select the desired channel. The extension is then assigned in the same way as for the personal channels of individual users.
{% endtab %}
{% endtabs %}

<details>

<summary><strong>The following number sequences cannot be assigned for technical reasons:</strong></summary>

* 110 (police emergency number Germany)
* 111 (emergency number New Zealand)
* 112 (fire and rescue emergency number Germany)
* 113
* 114
* 115 (government information Germany)
* 116
* 117
* 118
* 119
* 211
* 311
* 411
* 511 (US hotline number)
* 611
* 711 (US long-distance operator)
* 811
* 911 (emergency number USA)
* 999 (emergency number UK)
* 9900-9999

</details>

All users of the account can reach each other via the extension. Please note that, from a mobile phone, the extensions must be terminated with \* and must be at least two digits long in order to be dialed. So if you want to reach extension 10 from a mobile phone, dial 10\* to call the line. Single-digit variants such as \*1 cannot be dialed from the mobile network.&#x20;


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