openx is an ad exchange. That means they work as a middleman between advertisers who buy ad space and publishers who sell ad space. openx has been authorized to sell the ad space on 154 publisher domains. You can view these domains below.
0.01% of the publishers we track have authorized openx. openx's certificate ID is
6a698e2ec38604c6. Verify here .
This information is gathered by crawling ads.txt files on millions of websites. Ads.txt is an initiative developed by Google, the IAB and others to fight ad fraud.