Every .dk domain that delegates its _acme-challenge name to fd7a1b2d30a7d4c9f58c23c379f0d915.acme.above.com. 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.