Hi there ussp! Welcome to the forums and thank you for reaching out! Yes, we can set up PTRs and they should reflect on Comcast servers in approximately an hour and 12 to 24 hours for full worldwide propagation. Please click on our handle (ComcastBiz_Support) and send a private message with your name, the business name, the complete service address (including city, state, ZIP, suite number, etc), to verify each account we'll be modifying the PTRs on, as well as the IPs and the respective domains they need to point to.
Oh no! I am sorry to learn that you are not able to send any further messages. May I ask why you are not able to send any further private messages? -Gabriel