The nameserver ns1.desec.io appears in the delegation of 622 .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, 510 (82.0%) validate as secure — comfortably above the zone-wide average of 62.7%, while 98 (15.8%) are unsigned, and 13 (2.1%) currently fail validation outright (bogus) — a further 1 come back indeterminate.

One thing worth flagging: 11 of these domains (1.8%) 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.