Every .dk domain that delegates its _acme-challenge name to cdcc9359-8fba-4a3b-9a89-8ec6c368010d.14.authorize.certificatemanager.goog. 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.