> For the complete documentation index, see [llms.txt](https://yudu-sentinel.gitbook.io/sentinel-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yudu-sentinel.gitbook.io/sentinel-documentation/spaces/hotline/blocklist.md).
# Blocklist
Prevent unwanted calls
Unwanted calls can be prevented by adding the problem numbers to the Hotline blocklist.
The blocklist tab show the blocklist.
To add a number to the blocklist:
{% stepper %}
{% step %}
#### Click 'Add Number'
{% endstep %}
{% step %}
#### Block number
Enter the number details and an optional reason.
Click 'block' to add the number to the Blocklist.
{% endstep %}
{% endstepper %}
