The nameserver ns2.borsen.dk appears in the delegation of 13 .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, 10 (76.9%) validate as secure — comfortably above the zone-wide average of 62.7%, while 1 (7.7%) are unsigned, and 2 (15.4%) currently fail validation outright (bogus).

One thing worth flagging: 2 of these domains (15.4%) 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.