The nameserver B.PORTSDNS.NET appears in the delegation of 4,913 .dk domains in our dataset — 0.37% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 143 (2.9%) validate as secure — below the zone-wide average of 62.8%, while 4,621 (94.1%) are unsigned, with none failing validation outright — a further 149 come back indeterminate.

One thing worth flagging: 84 of these domains (1.7%) 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.