My internet connection went down today for a few hours. Technically, I guess it didn’t go down, but DNS wasn’t working. So I could ping 216.58.216.68, but I couldn’t ping www.google.com. I had been using the DNS servers from comcast that I got from DNS. I believe they’re 75.75.75.75 and 75.75.76.76. But since these weren’t working for me, I changed to the following:

208.67.222.222 (opendns)
208.67.220.220 (opendns)

and now things are working again.

I could also use:

8.8.8.8 (google)
8.8.4.4 (google)

Update:
Found out that in Chicago, the comcast DNS servers are:

68.87.72.134
68.87.77.134

I know these were not the servers that I was assigned. I’ll hang on to them in case needed.