The nameserver ns6.sitnet.dk appears in the delegation of 2,455 .dk domains in our dataset — 0.18% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 2,449 (99.8%) validate as secure — comfortably above the zone-wide average of 62.8%, while 1 (0.0%) are unsigned, and 2 (0.1%) currently fail validation outright (bogus) — a further 3 come back indeterminate.

One thing worth flagging: 5 of these domains (0.2%) 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.