This page lists every .dk domain whose delegation includes the nameserver rdns2.cj2.nl, 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 |
|---|---|---|---|
| 0.d.b.1.0.0.a.2.ip6.arpa | 2a00:1bd0::/32 | 1 | 2026-10-13 |
| 16.103.185.in-addr.arpa | 185.103.16.0/24 | 1 | 2026-10-13 |
| 222.132.213.in-addr.arpa | 213.132.222.0/24 | 1 | 2026-10-16 |
| 248.22.5.in-addr.arpa | 5.22.248.0/24 | 1 | 2026-10-17 |
| 249.22.5.in-addr.arpa | 5.22.249.0/24 | 1 | 2026-10-16 |
| 250.22.5.in-addr.arpa | 5.22.250.0/24 | 1 | 2026-10-16 |
| 88.124.94.in-addr.arpa | 94.124.88.0/24 | 1 | 2026-10-17 |
| 94.124.94.in-addr.arpa | 94.124.94.0/24 | 1 | 2026-10-16 |
in-addr.arpa / ip6.arpa zones delegated to rdns2.cj2.nl, 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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