How to get rid of fantastigames dns?

I already got rid of the toolbar, the homepage and the little thing where you open a new page and the toolbar comes up. But my DNS won't change. The way I can tell is when i open a tab and type something random in the bar and click enter. your dns will try to correct you. When I do it, google dns or opendns or at&t dns does not pop up. fantastigames pops up. it's not an extension. i even when to internet options and changed my dns to opendns but it still will not work. Does anybody have and advice. I use firefox by the way.