Every .dk domain that delegates its _acme-challenge name to 7dda8d9b-ee14-4a28-9952-df0bc21e070a.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.