Just ran pingplotter... Issues seem to be occurring on 68.1.5.140 and it causes everything else to spike.
I have the same issue and I think its Cox's routes. I have asked them for everything I could think of but I ended up getting charged because I let a tech come out and "try" to fix the problem. I don't have the problem cause its cox's but they don't admit that but my tip here is don't let them get to you to get a tech to come out cause its a trick.
This link is my thread with the same problem
btw I live in Kansas too. and you don't have the problem as your hop#1 is your router. just don't let them trick you
