This page lists every .dk domain whose delegation includes the nameserver dns2.ef-service.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 |
|---|---|---|---|
| 151.94.109.in-addr.arpa | 109.94.151.0/24 | 1 | 2026-10-16 |
| 205.178.144.in-addr.arpa | 144.178.205.0/24 | 1 | 2026-10-02 |
| 60.145.90.in-addr.arpa | 90.145.60.0/24 | 1 | 2026-10-16 |
| 63.145.90.in-addr.arpa | 90.145.63.0/24 | 1 | 2026-10-16 |
| 64.145.90.in-addr.arpa | 90.145.64.0/24 | 1 | 2026-10-17 |
| 64.51.161.in-addr.arpa | 161.51.64.0/24 | 1 | 2026-10-18 |
| 82.51.161.in-addr.arpa | 161.51.82.0/24 | 1 | 2026-10-16 |
| 87.145.90.in-addr.arpa | 90.145.87.0/24 | 1 | 2026-10-16 |
in-addr.arpa / ip6.arpa zones delegated to dns2.ef-service.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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