Ports for softphones to work

Hey there! We are grateful that you have reached out to the Comcast Digital Care team for help with those ports! Thank you so much for your patience. As someone who also has family members who use Comcast business service for their softphones, I understand the importance of knowing what ports will work. Here is a link to more details on the list of blocked ports by Comcast. Please let me know if this helps. https://business.comcast.com/help-and-support/internet/ports-blocked-on-comcast-network/ -Gabriel