A few dead boards have been removed due to extended downtime. 16chan.xzy, 22chan.org, hivechan.com,
22chan has posted a link to https://livechan.org which is a chatroom for the site.
If anyone has any history on what happened to these sites or know if they have changed domains or plan on relaunching, feel free to comment. No login needed to comment, but comments with links are held for moderation.