The nameserver auth01.ns.dk-hostmaster.dk appears in the delegation of 206 .dk domains in our dataset — 0.02% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 144 (69.9%) validate as secure — comfortably above the zone-wide average of 62.8%, while 0 (0.0%) are unsigned, and 1 (0.5%) currently fail validation outright (bogus) — a further 61 come back indeterminate.

One thing worth flagging: 62 of these domains (30.1%) 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.