Every .dk domain that delegates its _acme-challenge name to c70e4bbf-aa8c-4a35-814f-454fdb886c5c.acmedns.infinityfree.net. 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.