Every .dk domain that delegates its _acme-challenge name to b0b08a1e-1dba-48a9-9b7b-46424d95dff9.10.authorize.certificatemanager.goog. 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.