Every .dk domain that delegates its _acme-challenge name to ceac2c32-e6e2-4178-99bf-d656a3f5a0f3.17.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.