The nameserver ns.profdoc.dk appears in the delegation of 650 .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, 9 (1.4%) validate as secure — below the zone-wide average of 62.7%, while 597 (91.8%) are unsigned, with none failing validation outright — a further 44 come back indeterminate.

One thing worth flagging: 4 of these domains (0.6%) 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.