Every .dk domain that delegates its _acme-challenge name to 7e2e9ce0-1c92-4844-8aba-547d8d7dd4b1.validate.ravnit.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.