Every .dk domain that delegates its _acme-challenge name to 2d15eaae-d9d4-4cc3-b96a-8cff8761738f.stackpath-tls.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.