Every .dk domain that delegates its _acme-challenge name to 98b4aa9b7306bc8d8bab00479623d8f6.51962acbb3fb395ad7687b0bbb01ede0.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.