The nameserver ns1.dns-123.net appears in the delegation of 772 .dk domains in our dataset — 0.06% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 0 (0.0%) validate as secure — below the zone-wide average of 62.8%, while 0 (0.0%) are unsigned, and 4 (0.5%) currently fail validation outright (bogus) — a further 768 come back indeterminate.

One thing worth flagging: 772 of these domains (100.0%) 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.