Every .dk domain whose www name is a CNAME to a71b82bd7cb26426998647b1f4267a4b-1012194274.eu-west-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.