The nameserver sofia.ns.cloudflare.com appears in the delegation of 182 .dk domains in our dataset — 0.01% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 42 (23.1%) validate as secure — below the zone-wide average of 62.8%, while 135 (74.2%) are unsigned, with none failing validation outright — a further 5 come back indeterminate.

One thing worth flagging: 2 of these domains (1.1%) 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.