The nameserver kay.ns.cloudflare.com appears in the delegation of 273 .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, 16 (5.9%) validate as secure — below the zone-wide average of 62.7%, while 250 (91.6%) are unsigned, with none failing validation outright — a further 7 come back indeterminate.

One thing worth flagging: 6 of these domains (2.2%) 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.