The nameserver ns6.markmonitor.com appears in the delegation of 1,852 .dk domains in our dataset — 0.14% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 1 (0.1%) validate as secure — below the zone-wide average of 62.8%, while 1,821 (98.3%) are unsigned, with none failing validation outright — a further 30 come back indeterminate.

One thing worth flagging: 13 of these domains (0.7%) 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.