Every .dk domain that delegates its _acme-challenge name to a37ee4dc-97d3-41fa-a3d7-9efac9a87b92.acmedns.dlx.hosting. 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.