🔄 Reverse NS Lookup

Find all domains using this nameserver

This page lists every .dk domain whose delegation includes the nameserver ns1.dns-123.net, 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.

🧭 ns1.dns-123.net at a glance#

nameserver profile from our scan data

The nameserver ns1.dns-123.net appears in the delegation of 763 .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 64.0%, while 0 (0.0%) are unsigned, and 4 (0.5%) currently fail validation outright (bogus) — a further 759 come back indeterminate.

One thing worth flagging: 763 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.

🖥️ ns1.dns-123.net#

Probed 2026-10-08 06:34
Network
Probes
AXFR Refused
IXFR Refused
Glue N/A
ANY REFUSED
Version PowerDNS Authoritative Server 4.5.1 (built Jul 26 2021 13:34:25…

🧩 Protocols & RFCs#

probed 2026-10-15 12:46

Not profiled: every domain we hold for it is a lame delegation, so there is no zone to ask it about. Retried every few days.

🔗 Nameserver sets using ns1.dns-123.net#

top 2 by domains
Nameserver setDomainsAvg response (A)NS lookup
ns1.dns-123.net · ns2.dns-123.net · ns3.dns-123.net 544 — —
ns1.dns-123.net · ns2.dns-123.net 219 — —

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.

📈 DNSSEC Status Over Time

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