Every .dk domain whose web server address has the reverse-DNS (PTR) name 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.4.4.0.0.1.2.1.8.c.b.0.1.0.0.2.lb.fr-par.scw.cloud, which usually identifies one physical or virtual hosting server. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.