The nameserver ns4.simply.com appears in the delegation of 153,507 .dk domains in our dataset — 11.54% of every scanned .dk domain. The full list is below — here is how those domains look under the hood.

On the DNSSEC side, 138,271 (90.1%) validate as secure — comfortably above the zone-wide average of 62.8%, while 1,468 (1.0%) are unsigned, and 2,010 (1.3%) currently fail validation outright (bogus) — a further 11,758 come back indeterminate.

One thing worth flagging: 13,600 of these domains (8.9%) 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.