Hacker News new | ask | show | jobs
by scurvy 4467 days ago
Unlikely, but possible. Large web hosts end up on the list from time to time, and a lot of innocent sites are blocked in the process. It's an incredibly difficult process to find out what site triggered the initial block and to get your IP's removed from the list.

Yes, they use IP's. They don't do URL-level filtering. They use IP's.