I have the same issue. I would expect NOT to see COX private IP address like 10.51.0.1 from the cox network. I have also confirmed that I can see their 10.10.10.0-254 range. (try to ping 10.10.10.# from your residential or business). In my experience, it appears that they have allowed internal IP space to be seen on the public space. I will call them again and post an update as to why this is happening.
I really think they dont care. My neighborhood has no other service provider option so there really is no need for action their part. Last tech out yesterday straight up said that your internet should start working again around 30 April 2020. Makes sense, thats the ETA for lock down to be lifted. The answer has never been "Yah we will come split the node." Which is the only correct answer in this case.
All, I am on call now with Tyler with Cox business support. I have also forward this to support@coxmail.com along with my screen shots of traceroutes and pings showing that internal IP spaces of 10.x that is causing us pain. I have asked them to update here as I have many cox residential and business customers complaining about the same thing.
