The nameserver ns01.hadab.se 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, 3 (23.1%) validate as secure — below the zone-wide average of 62.7%, while 10 (76.9%) are unsigned, with none failing validation outright.

Delegation health looks clean, too: none of these domains currently register as lame delegations at this nameserver.