The nameserver ns4.au.dk appears in the delegation of 639 .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, 570 (89.2%) validate as secure — comfortably above the zone-wide average of 62.7%, while 60 (9.4%) are unsigned, and 3 (0.5%) currently fail validation outright (bogus) — a further 6 come back indeterminate.

One thing worth flagging: 8 of these domains (1.3%) 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.