Every .dk domain that delegates its _acme-challenge name to e47ca874-fe3e-40a5-9ebc-ca9a0d70c69d.8.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.