Every .dk domain that delegates its _acme-challenge name to 342f2ec0-75fe-4d89-90ba-656298b70f0c.auth.weiser.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.