If you're concerned about a specific IP, and haven't been abusing HN, it should be easy to clear up by emailing [email protected]. And even if you have been abusing HN, we're always happy to unban people (and/or their IPs) if they give us reason to believe that they've taken https://news.ycombinator.com/newsguidelines.html to heart and will follow the rules in the future.
If you're concerned about a specific IP, and haven't been abusing HN, it should be easy to clear up by emailing [email protected]. And even if you have been abusing HN, we're always happy to unban people (and/or their IPs) if they give us reason to believe that they've taken https://news.ycombinator.com/newsguidelines.html to heart and will follow the rules in the future.