Every .dk domain that delegates its _acme-challenge name to d4365d27-92f3-4d73-9e8f-4d608998d9be.acme.de-la.dk. 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.