Every .dk domain that delegates its _acme-challenge name to 967c2c2d56a8e43a9150224dac5d7a5e.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.