Every .dk domain whose A record resolves to 217.31.81.20. Shared-hosting servers often carry hundreds of sites on one address; this reverse IP lookup shows exactly which .dk names share it. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.
| CIDR | Reverse zone | Nameservers |
|---|---|---|
| 217.31.80.0/20 | 80.31.217.in-addr.arpa | ns1.fra.hostserver.de ns3.hostweb.de |
The zone shown is the most specific level that answers an NS query, so a classless delegation may report its parent.