This page lists every .dk domain whose delegation includes the nameserver rdns1.c-f.ro, 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 |
|---|---|---|---|
| 120.200.91.in-addr.arpa | 91.200.120.0/24 | 1 | 2026-10-13 |
| 120.223.176.in-addr.arpa | 176.223.120.0/24 | 1 | 2026-10-16 |
| 121.223.176.in-addr.arpa | 176.223.121.0/24 | 1 | 2026-10-16 |
| 122.200.91.in-addr.arpa | 91.200.122.0/24 | 1 | 2026-10-16 |
| 123.223.176.in-addr.arpa | 176.223.123.0/24 | 1 | 2026-10-16 |
| 132.214.95.in-addr.arpa | 95.214.132.0/24 | 1 | 2026-10-16 |
| 133.214.95.in-addr.arpa | 95.214.133.0/24 | 1 | 2026-10-10 |
| 136.121.85.in-addr.arpa | 85.121.136.0/24 | 1 | 2026-10-16 |
| 138.44.89.in-addr.arpa | 89.44.138.0/24 | 1 | 2026-10-10 |
| 145.102.46.in-addr.arpa | 46.102.145.0/24 | 1 | 2026-10-16 |
| 156.212.188.in-addr.arpa | 188.212.156.0/24 | 1 | 2026-10-13 |
| 22.14.31.in-addr.arpa | 31.14.22.0/24 | 1 | 2026-10-16 |
| 250.215.188.in-addr.arpa | 188.215.250.0/24 | 1 | 2026-10-16 |
| 251.215.188.in-addr.arpa | 188.215.251.0/24 | 1 | 2026-10-16 |
| 254.181.81.in-addr.arpa | 81.181.254.0/24 | 1 | 2026-10-09 |
| 68.226.193.in-addr.arpa | 193.226.68.0/24 | 1 | 2026-10-13 |
| 69.226.193.in-addr.arpa | 193.226.69.0/24 | 1 | 2026-10-16 |
in-addr.arpa / ip6.arpa zones delegated to rdns1.c-f.ro, 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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