I'm getting 50% packet loss on RCN in Chicago and both of the company's support lines give a busy signal when called.

I'm on the phone with Comcast now, but I'm having trouble convincing the guy there's a problem :)

You've got to drop actual technical data on them. Are you seeing complete routes to some destinations and not others? Do the incomplete routes stop inside Comcast's network?

Reddit, Hacker News for two more here.

ditto. all websites started loading slow for me around 12:45 eastern. I'm on Comcast business from South Bend, Indiana

Update: I've created a separate thread: https://news.ycombinator.com/item?id=15637412

Also comcast.

    >tracert news.ycombinator.com
    ....
    Tracing route to news.ycombinator.com.cdn.cloudflare.net [104.20.43.44]
    over a maximum of 30 hops:

      8    12 ms    12 ms    12 ms  be-10563-pe01.350ecermak.il.ibone.comcast.net [68.86.82.158]
      9     *        *        *     Request timed out.
     10     *      161 ms   149 ms  104.20.43.44

I'm on Comcast, which might explain a lot.

I'm actually having problems on Verizon as well, so I don't think it's just a Comcast problem.

And Comcast in Minneapolis.

Same on Xfinity in Oakland. What could cause this?!

Comcast sucking?

Same here with Comcast in Oregon.

Likewise. Comcast in Atlanta.

Also Comcast in denver

And Github.