Every .dk domain that delegates its _acme-challenge name to e0ebd0d0-4b72-45c7-bb32-c0cb01d6e3a0.acme.aau.dk. 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.