Every .dk domain that delegates its _acme-challenge name to 0a9dd006-c018-4d27-b79c-1d8ebf64a629.auth.acme-dns.io. 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.