> For the complete documentation index, see [llms.txt](https://docs.ilert.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ilert.com/knowledge-base/call-routing/how-to-block-certain-numbers.md).

# How to block certain numbers?

You can block unwanted numbers from calling your call routing number by adding a "Block" node in the call flow editor.

## Using the Block node

1. Open your call routing configuration
2. Navigate to the call flow editor
3. Add a "Block" node to your call flow
4. Configure the node to specify which numbers should be blocked
5. Connect the Block node to handle incoming calls from unwanted numbers

The Block node allows you to specify phone numbers (including country code, e.g. +12401234567) that should be blocked from reaching your call routing system.

To see your current call routing configuration, open the call routing configuration page:

{% hint style="info" %}
**Related Documentation**

* [Call Routing](https://docs.ilert.com/call-routing/getting-started-with-call-routing)
* [Phone Numbers](https://docs.ilert.com/getting-started/phone-numbers)
  {% endhint %}


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