Every .dk domain that delegates its _acme-challenge name to b1bc416b29645c5331eba21f97d8891e_tamtrondk.v1.seravocerts.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.