The nameserver one.cloudns.dk appears in the delegation of 731 .dk domains in our dataset — 0.05% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 98 (13.4%) validate as secure — below the zone-wide average of 62.8%, while 588 (80.4%) are unsigned, and 2 (0.3%) currently fail validation outright (bogus) — a further 43 come back indeterminate.

One thing worth flagging: 24 of these domains (3.3%) look like lame delegations — the .dk registry still points them here, but this nameserver doesn't answer authoritatively for the zone, which usually means the hosting was cancelled and the delegation was left dangling.