Every .dk domain whose www name is a CNAME to a6c2854d4dfac11e98e80068ba889d5b-1308284515.eu-central-1.elb.amazonaws.com, i.e. the website is hosted on that platform. A target that no longer exists is flagged as dangling. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.