Every .dk domain that delegates its _acme-challenge name to d8bdab43-e310-43a9-ae2b-a2dbaa92f5ec.certbot.ilva.net. 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.