There are instructions for visiting 4chan upthread, it's extremely NSFW. http://status.4chan.org/ http://status.4chan.org/ is a SFW status blog which will check

There are instructions for visiting 4chan upthread, it's extremely NSFW. http://status.4chan.org/ http://status.4chan.org/ is a SFW status blog which will check if sites are 'up' from your browser, "img" is the server that hosts /b/ (and /r9k/ as well I believe).