How do I Block Numbers Domain-Wide?

Updated at April 3rd, 2025

Prerequisites:

Access to the Manager Portal.

500 Number Limit

Adding more than 500 blocked numbers will still be enforced in call processing; however, the Portal will not properly populate the blocked number list. For full functionality, we suggest only blocking a maximum of 500 numbers.

 

Overview

The Domain-Wide Call Blocking feature allows you to block numbers company-wide (domain-wide) instead of user- or system-wide only. This prevents specific numbers from calling the entire organization. Domain-wide call blocking can be found on the Call History page in the Portal.

By default, the system will send a 603 to reject the call, also known as a decline. It indicates that the destination (the person you're calling) has rejected the call. 

Audio will be played during rejection ("The person you are calling isn't taking calls right now").

This page consists of a "blocked numbers" modal that maintains a list of domain-wide blocked numbers and a "block number" button that is available across from *applicable phone numbers. The next section explains these in greater detail. 

Navigate to the Manager Portal > Select a Domain > Call History

Click the "Blocked Numbers" button (above).

  1. Use the "Blocked Numbers" modal (below) to add or remove blocked numbers for the entire domain.
  2. The number must be less than 15 digits and should not include special characters or letters. 

You will see a success message like the one below when a number is added or deleted.

"Block Number" Button & Icons - Call History Page

The Call History page will have a "block number" button across from applicable phone numbers. When a number is unblocked, the button looks like a grey circle with a single line crossing diagonally in the middle, and it will change color to red when the number is blocked. 

Click the "block number" button to block this phone number domain-wide. Before performing this action, you will be prompted to confirm or cancel it. 

If a number in the Call History table is on the Call Blocking list, the Call History page will display a blocked icon in the Duration PAC column and another icon at the end of the row. The icons help distinguish between a blocked and an unblocked call. 

 

 

 

 

 

 

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