Your toll-free number is provided to you from the Swept team upon request and during initial set up.
The same toll-free number is used for IVR and SMS.
You can view your phone number by going to the cog wheel in the top right hand corner of the web app and select "Settings". Above the "Notifications" title you will see "Assigned IVR" and a phone number beside it. This is your IVR/SMS phone number.
If you do not see a phone number please reach out to the Swept team at email@example.com.