---
title: "Call blocking"
slug: "inbound-call-blocking"
description: "Block specific inbound phone numbers or prefixes from calling your contact center."
tags: ["blocklist", "blocking calls", "block", "Inbound", "call blocking"]
updated: 2025-09-23T15:50:28Z
published: 2025-09-23T15:50:28Z
canonical: "docs.voiso.com/inbound-call-blocking"
---

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

# Blocked numbers

**Who should read this article**: Administrators

Block specific inbound phone numbers or prefixes from calling your contact center.

          Important

    

The **Blocked numbers** feature is available for contact centers on the Pro plan or higher.

## Introduction

The blocked numbers feature enables you to prevent inbound calls from certain phone numbers or prefixes so that calls from specified phone numbers or prefixes do not reach your contact center.

## Blocked numbers page

To add phone numbers and prefixes to your list of blocked numbers or to manage your blocked numbers, from the Voiso main menu, navigate to **Inbound > Blocked numbers**.

![Inbound Call Blocking Page](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Inbound%20Call%20Blocking%20View.png)

### Finding a blocked number

To search for a number or prefix in the blocklist, enter one or more characters, such as *44* or *Anonymous*, in the **Search** field. Only numbers starting with the search string are displayed in the blocklist table.

### Blocklist table

The blocklist table contains a list of all the numbers and prefixes that are blocked from calling your contact center. The table lists the blocked number, the reason it was blocked, the date it was blocked, and the email address or username of the person who blocked the number.

### Adding a blocked number

To add a number or prefix to the Blocked numbers list (blocklist), follow these steps:

1. In the **Add number or prefix** panel, click **Add number**.
2. Enter a phone number or prefix in the **Number or prefix** field.
3. Enter a reason why the number is blocked in the **Reason** field.
4. Click **Save**.

![Inbound Blocked Number Add Blocked Number Panel](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Inbound%20Blocked%20Number%20Add%20Blocked%20Number%20Panel.png)

### Deleting a blocked number

To remove a blocked number or prefix from the blocklist table, click the trash can icon (**Delete** button) on the right side of the row containing the number.

A telephone prefix is the first set of digits after the country and area codes of a telephone number: country code + area code + prefix + subscriber number. The prefix is sometimes associated with a region (exchange) within the area represented by the area code.

The list of phone numbers or phone number prefixes that may not call into your contact center. This feature ensures that calls from certain phones or regions do not get handled by your contact center.

## Related

- [How to start receiving calls](/how-to-start-receiving-calls.md)