Every .dk domain that delegates its _acme-challenge name to 7fc6673c-953c-4fec-8a96-fcced1cf2594.auth.ghosting.dk. Such CNAMEs hand DNS-01 certificate validation to a shared service, so this list shows who issues TLS certificates through it. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.