Every .dk domain that delegates its _acme-challenge name to fe38e2d4-9e15-427e-a1ff-97ed2c75075d.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.