Every .dk domain that delegates its _acme-challenge name to 7f662e26-0447-4728-b028-cc12d43c37d7.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.