The nameserver ns5.dns-123.net appears in the delegation of 6,516 .dk domains in our dataset — 0.49% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 5,897 (90.5%) validate as secure — comfortably above the zone-wide average of 62.5%, while 80 (1.2%) are unsigned, and 485 (7.4%) currently fail validation outright (bogus) — a further 54 come back indeterminate.

One thing worth flagging: 536 of these domains (8.2%) 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.