Every .dk domain whose A record resolves to 81.27.209.21. 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 |
|---|---|---|
| 81.27.208.0/20 | 81.in-addr.arpa | ns3.afrinic.net ns3.lacnic.net ns4.apnic.net pri.authdns.ripe.net rirns.arin.net |
| 81.27.208.0/21 | 81.in-addr.arpa | ns3.afrinic.net ns3.lacnic.net ns4.apnic.net pri.authdns.ripe.net rirns.arin.net |
The zone shown is the most specific level that answers an NS query, so a classless delegation may report its parent.