Every .dk domain that delegates its _acme-challenge name to c5022c9d-b985-44f3-b5bb-29bf654430dd.17.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.