Are you unable to access HN from https:// as well as http://? I know of some recent issues where some Comcast ip ranges in San Francisco were unable to access the site without switching to https.
I'm able to get to the site on http now but a few months back I was having the same problem. I couldn't get to the site on http so was using proxies for a while but then realized https worked fine. Not really sure what was going on.. but like I said, all is well now. I'm on Time Warner in the Raleigh NC area.