Every .dk domain that delegates its _acme-challenge name to ed742f8d-3a62-4a51-a644-20c2dcd1d43b.c-934a.tx.auth.certifytheweb.com. 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.