This page lists every .dk domain whose delegation includes the nameserver ns3.master.cz, 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.
Not probed yet. This nameserver is queued; the probe runs in the background and the result usually shows here within a few minutes.
| Reverse zone | Prefix | Prefixes | Checked |
|---|---|---|---|
| 16.79.80.in-addr.arpa | 80.79.16.0/24 | 1 | 2026-10-09 |
| 180.145.194.in-addr.arpa | 194.145.180.0/24 | 1 | 2026-10-09 |
| 181.145.194.in-addr.arpa | 194.145.181.0/24 | 1 | 2026-10-16 |
| 224.167.83.in-addr.arpa | 83.167.224.0/24 | 1 | 2026-10-16 |
| 224.185.89.in-addr.arpa | 89.185.224.0/24 | 1 | 2026-10-15 |
| 225.167.83.in-addr.arpa | 83.167.225.0/24 | 1 | 2026-10-16 |
| 243.167.83.in-addr.arpa | 83.167.243.0/24 | 1 | 2026-10-16 |
| 244.167.83.in-addr.arpa | 83.167.244.0/24 | 1 | 2026-10-16 |
| 252.185.89.in-addr.arpa | 89.185.252.0/24 | 1 | 2026-10-16 |
| 27.79.80.in-addr.arpa | 80.79.27.0/24 | 1 | 2026-10-16 |
| 32.238.178.in-addr.arpa | 178.238.32.0/24 | 1 | 2026-10-03 |
| 32.31.81.in-addr.arpa | 81.31.32.0/24 | 1 | 2026-10-08 |
| 34.31.81.in-addr.arpa | 81.31.34.0/24 | 1 | 2026-10-16 |
| 37.31.81.in-addr.arpa | 81.31.37.0/24 | 1 | 2026-10-16 |
| 46.238.178.in-addr.arpa | 178.238.46.0/24 | 1 | 2026-10-16 |
in-addr.arpa / ip6.arpa zones delegated to ns3.master.cz, found from the SOA of the reverse name of each IPv4 /24 behind the zone's websites (and any CIDR page viewed), so the zone is the real delegation point, at whatever prefix length it sits. A /24 whose reverse delegation is broken (SERVFAIL) is not credited to anyone.
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