This page lists every .dk domain whose delegation includes the nameserver ns0.zen.co.uk, 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 |
|---|---|---|---|
| 0.155.217.in-addr.arpa | 217.155.0.0/24 | 1 | 2026-10-20 |
| 0.68.82.in-addr.arpa | 82.68.0.0/24 | 1 | 2026-10-18 |
| 128.104.77.in-addr.arpa | 77.104.128.0/24 | 1 | 2026-10-19 |
| 135.104.77.in-addr.arpa | 77.104.135.0/24 | 1 | 2026-10-16 |
| 141.104.77.in-addr.arpa | 77.104.141.0/24 | 1 | 2026-10-16 |
| 147.104.77.in-addr.arpa | 77.104.147.0/24 | 1 | 2026-10-16 |
| 148.104.77.in-addr.arpa | 77.104.148.0/24 | 1 | 2026-10-16 |
| 160.104.77.in-addr.arpa | 77.104.160.0/24 | 1 | 2026-10-16 |
| 165.104.77.in-addr.arpa | 77.104.165.0/24 | 1 | 2026-10-16 |
| 166.104.77.in-addr.arpa | 77.104.166.0/24 | 1 | 2026-10-16 |
| 171.104.77.in-addr.arpa | 77.104.171.0/24 | 1 | 2026-10-16 |
| 172.155.217.in-addr.arpa | 217.155.172.0/24 | 1 | 2026-10-16 |
| 180.104.77.in-addr.arpa | 77.104.180.0/24 | 1 | 2026-10-16 |
| 183.104.77.in-addr.arpa | 77.104.183.0/24 | 1 | 2026-10-16 |
| 188.104.77.in-addr.arpa | 77.104.188.0/24 | 1 | 2026-10-16 |
| 232.69.82.in-addr.arpa | 82.69.232.0/24 | 1 | 2026-10-16 |
| 64.66.146.in-addr.arpa | 146.66.64.0/24 | 1 | 2026-10-19 |
| 79.66.146.in-addr.arpa | 146.66.79.0/24 | 1 | 2026-10-16 |
| 80.66.146.in-addr.arpa | 146.66.80.0/24 | 1 | 2026-10-16 |
| 82.66.146.in-addr.arpa | 146.66.82.0/24 | 1 | 2026-10-16 |
| 83.68.82.in-addr.arpa | 82.68.83.0/24 | 1 | 2026-10-16 |
| 84.66.146.in-addr.arpa | 146.66.84.0/24 | 1 | 2026-10-16 |
| 85.66.146.in-addr.arpa | 146.66.85.0/24 | 1 | 2026-10-16 |
| 86.66.146.in-addr.arpa | 146.66.86.0/24 | 1 | 2026-10-16 |
| 88.66.146.in-addr.arpa | 146.66.88.0/24 | 1 | 2026-10-16 |
in-addr.arpa / ip6.arpa zones delegated to ns0.zen.co.uk, 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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