Every .dk domain that delegates its _acme-challenge name to d08a8a0a-d341-4258-9771-0c81981c55bb.auth.blaklader.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.