Each real-time tracking URL sent in a text message has base URL. It's possible to change the base URL in each campaign.  Available base URLs include
  • long-text.com
  • our-sale.com
  • text-sauce.com
  • myfeedback.is (used in surveys/feedback campaigns)
  • show-me-more.com
  • myfeedback.is (secure version)
(More URLs coming soon).
Changing URL is very easy. 
Under the design aspect of the campaign use the drop down select to change the base URL.