A helpful tool for troubleshooting call examples is the 4.0.2 Destination Trace Report. This can be accessed via the XCS Support URL Analytics section.  A supervisor/admin login is needed to access this section.  Once you log in navigate to the referenced report and populate the data elements and select View Report.

Here you can see any time the number is called into the system, the output will look something like this.  The information provided here will help assist in troubleshooting or investigating certain call paths.