Every .dk domain whose www name is a CNAME to 2444e0dc-454a-4daf-a4b0-2ad0d9ddc1a7.cfargotunnel.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.