URLs used to view the list of ad servers have changed. Please check the main page.
I've made a few changes to the list of ad servers on this site, including adding the option to view the list of IP addresses associated with the ad server hostnames. Because of this, the list now uses a different URL for each format. Have a look at the main page for more details.
Please have a look at the main page for more details , or wait to be redirected to (hopefully) the page you were trying to get to. This should now be
http://pgl.yoyo.org/as/serverlist.php?hostformat=ipchainsand will happen approximately 15 seconds after loading this page. Feel free to mail me with any comments.