> 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/using-sipgate/telefonie/anonyme-und-unerwuenschte-anrufe-blockieren-oder-umleiten.md).

# Block or redirect anonymous and unwanted calls

With your account, you can control how unwanted callers are handled — either block them or redirect them straight to voicemail. This applies both to specific numbers you want to block as well as anonymous calls or advertising calls.

{% hint style="warning" %}
Important: For blocking to work, voicemail must be booked and activated.
{% endhint %}

#### Anonymous calls

Open the [**User detail page**](https://app.sipgate.com/users) and click on **Edit routing**.\
There you will find the switch *Block anonymous calls.*

![sipgate-help-center-anonym1.png](/files/201174ef6d4dba492f49940535e9491060872c36)

* **Block**: Callers hear a message that you are currently unavailable.\
  \&#xNAN;*Note: Existing forwarding rules will still apply.*
* **Redirect**: The call is routed directly to your voicemail, where callers can leave a message.

Confirm with **Save** and then click on **Finish editing**, so that the changes are applied.

{% hint style="info" %}
**Note:** On sipgate neo, the settings are not available in this form.
{% endhint %}

#### Anonymous faxes

For analog fax machines, there is the switch *Reject anonymous faxes*:

* **Block**: The calling fax receives an unavailable message and attempts to send again three times. ***Important:** Deactivate all forwarding rules first.*
* **Redirect**: The fax lands in voicemail. There you will receive three messages with fax tones.

{% hint style="info" %}
**Note:** On sipgate neo, the settings are not available in this form.
{% endhint %}

#### Block list for unwanted calls

If you want to block specific numbers (e.g. advertising calls), use the block list.\
Go to **My Telephony** → **settings** → **Block list** and click on **Add phone number**.

![](/files/c0fcdca0a2c2390df8686e8bd602b3eef3a36ffa)

* **Exact number**: Enter the desired phone number and add it to the list.
* **Number ranges**: Enter the area code in international format (e.g. +49 1579) and check *Block all calls starting with this phone number*.

In the block list overview, you can see all blocked numbers and edit or delete them.

{% hint style="warning" %}
**Important:** The block list applies to all users of the account. Only calls can be blocked via the block list, not incoming faxes. For the block list to work, your voicemail must be booked and activated.
{% endhint %}

**Block phone numbers directly in the sipgate app**

In the sipgate app (version 2.30.0 or higher), you can block individual phone numbers directly from the call list. To do this, move the mouse pointer over a call. In the menu, you will find the option “Block number”, which automatically rejects future calls from this number. Numbers that are already blocked can be unblocked again via the same menu.

![Screenshot 2025-12-30 at 13.01.07.png](/files/e96ac3385255550263b39e1ee2e05ba44951a943)

Please note that in the app, only individual phone numbers can be blocked — blocking entire number ranges is currently not possible in the app.

#### Further reading

Information on blocking Direct IP (SPIT) calls can be found in the article:\
[*How do I block Direct IP (SPIT) calls from numbers like 100, 1001, or IP addresses?*](https://help.sipgate.de/hc/de/articles/21081871026973-Wie-blockiere-ich-Direct-IP-SPIT-Anrufe-von-Nummern-wie-100-1001-oder-IP-Adressen)


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