Every .dk domain that delegates its _acme-challenge name to adbff269-e2da-483c-a82b-a460c5c3d6b0.validation.litium.cloud. 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.