🔄 Reverse NS Lookup

Find all domains using this nameserver

This page lists every .dk domain whose delegation includes the nameserver ns4, together with its IP addresses, network, zone-transfer and ANY-query behaviour, the protocols and RFCs it supports (TCP, EDNS, cookies, NSID, DNS over TLS/HTTPS …), the nameserver sets it is used in and how fast those sets answer. Use it to size a DNS provider, audit a migration or find domains still pointing at an old server. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.

🧭 ns4 at a glance#

nameserver profile from our scan data

The nameserver ns4 appears in the delegation of 2 .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, 2 (100.0%) validate as secure — comfortably above the zone-wide average of 63.9%, while 0 (0.0%) are unsigned, with none failing validation outright.

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

Response time: across 2 timed domains, our resolver needed 102 ms on average to answer an A query and 99 ms for an NS query. Per nameserver set below.

🖥️ ns4#

Probed 2026-10-13 17:19
Network
No IPs resolved yet
Probes
AXFR Refused
IXFR Refused
Glue N/A
ANY No response
Version Hidden

🧩 Protocols & RFCs#

probed 2026-10-19 13:48

Not profiled: it has no public IPv4 address we could resolve. Retried every few days.

🔗 Nameserver sets using ns4#

top 1 by domains
Nameserver setDomainsAvg response (A)NS lookup
ns3.supportcenter.dk · ns4 · ns4.supportcenter.dk 2 102 ms 99 ms

Times are the scanner's own lookups through its resolver on each domain's latest scan, so they include resolver overhead; compare sets with each other rather than reading them as raw authoritative round-trip times.

Found 2 domains matching ns4
Domain
bliv-paedagog.dk View →
blivlaerer.dk View →
📈 DNSSEC Status Over Time

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