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How to use test numbers

You can rent test numbers from Voximplant to check and debug your scenarios. Learn how to rent test numbers and access them from PSTN/SIP.


On the Voximplant control panel, select My phone numbers on the left menu and then select Buy new phone number in the upper right corner.

The phone number interface will be displayed. Select Test numbers, select one or more test numbers and click Buy selected.

After you’ve bought a number, you'll immediately see this number on the list.


You have to associate a test phone number with one of your Voximplant applications to be able to call it. To do so, go to Applications, click on the needed application and switch to the Numbers tab. Here, click on the Available tab, select a number and click Attach.

Now you can call one of the access numbers displayed on the page and enter the test phone number as an extension. That's it.

callPSTN restriction

You CANNOT substitute test numbers as callerId while calling the callPSTN method. If a test number passed as the callerId parameter to this method, your scenario will fail during execution.

Thus, you can call test numbers (using your own mobile/landline phone or SIP), but cannot initiate calls from them.