The Troubleshooting section contains main issues that a CarrierX API user can face, and the ways to solve these problems.

I have set up a Third Party endpoint and try to place and receive calls, but have troubles doing that.

Please make sure that you have correctly set up the Third Party endpoint using either the CarrierX portal or programmatically using the API requests. You can find more information on how this can be done in our SIP Trunk Quick Start Guide.

Please pay additional attention that you must open your firewall for the incoming connections from the following IP addresses to be able to process the voice calls from CarrierX:

Signaling IPs

Media IPs

These IP addresses are used by the System Gateway endpoint—a system generated endpoint that is automatically created for each account and is used for correct voice calls routing.

I registered with CarrierX but cannot use some of the API methods (e.g., get details for phone number, get country by IP address, etc.)

Access to some of the API methods is disabled by default. You need some additional scopes enabled to get access to these methods. Please contact our technical support at to enable these scopes for your account.