There are multiple threads about this. Generally, for residential service, probably not.
And there are multiple posts of me writing this .@andyross. Please stop.......
Is there an option to get a 2nd Public IP?
They are phasing it out but I'm going to escalate your issue to the Comcast corporate employees that are available to these boards. We've seen cases here where they have been able to get this accomplished for customers even when it is not listed in their rate cards, YMMV. You should get a reply here in your topic. Good luck !
Hello! To discuss options to get a 2nd Public IP can you please send me a PM with your first and last name so I may further assist you? To send a private message, please click my name "ComcastThomasF" then select "Send a Message" on the right side.