Every .dk domain that delegates its _acme-challenge name to 0095b34f-e8e6-4666-98ca-6d4653f514cb.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.