Every .dk domain that delegates its _acme-challenge name to bbd8e5be4cd307562cf48ee8dc201c43.37fd116cfee7ae6154150f8e7a47c3a4.comodoca.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.