Support Centre

Blacklisting Numbers - 3CX Console

Matthew Fletcher

Please Note: While this guide is public, this assumes that you are a customer of Yamo for your VoIP solutions. As such, some information may not be accurate if you are not a customer. Yamo provides low-cost and powerful phone systems for businesses of all sizes.

If you are not using Yamo as your VoIP provider and would like to arrange a quote or demonstration, please reach out to us here for a chat.

Sometimes you may come across telemarketers, scam calls, or individuals that you no longer wish to speak to. 3CX systems have a feature that allows you to blacklist these using a settings module called "Blacklisted Numbers". 

Blacklisting a number

On a dedicated 3CX instance you are able to use the management console to monitor and moderate many features, one feature includes the blacklist. To add a number to the blacklist, please follow these steps:

  • Log into the management console and navigate to the Security tab on the left-hand side. After expanding this you should see a menu called Blacklisted Numbers.
  • Clicking this will take you to a page similar to the one below. Click on the blue + Add button to add in a number.




  • Enter the number you wish to blacklist in E164 format. For example, if you wish to block the number 02 9083 6690 you'd enter 61290836690. Please note: This is an example only, this is Yamo's main number, I wouldn't recommend blacklisting this as it would prevent us from reaching you.
  • Enter a helpful description. This allows you to review this page and see why you blocked a specific number.

Additional Assistance

If the steps listed above do not resolve your issue and you are a Yamo customer, please click here to raise a support case with us.

If you are not a Yamo customer and would like to have a chat to see how your business can benefit from our expert support and advice, please click here to book an obligation-free consultation and quote where we can discuss your business needs with one of our experts.

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