Can you ping it?
If not, look to see if the site was blocked by your network.

You can try a TRACERT. If that gets outside your corp network, it's time to call Comcast.

>Since a couple of days ago I have been having trouble connecting to UT site. Basically during the past two days, when I am at work, I cannot connect at all. I try IE 10, Chrome, FireFox, none connect.
>When I am at home (where I am now) I can connect to UT.
>The same computer, just different router and ISP (even though it is the same company, Comcast in the office or at home).
>Anybody else has similar problem?
>What do you suggest to check?