Does this number show on my Basic listings on CoStar?

No, call tracking numbers do not display on CoStar. For now, this feature is only available to listings with Diamond, Platinum, and Gold level exposure. However, if the exposure is changed to Silver, the listing will continue to display the call tracking number. If paid listing exposure is removed at the end of the initial term or any monthly term thereafter, the call tracking phone number will remain on file in the background on the Basic listing in case the listing gets upgraded again. The call tracking number will then disappear 60 days after the listing moves off-market.