Every .dk domain whose A record resolves to 128.121.21.137. 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 |
|---|---|---|
| 128.121.20.0/22 | 20.121.128.in-addr.arpa | auth1.ns.gin.ntt.net auth2.ns.gin.ntt.net auth3.ns.gin.ntt.net auth4.ns.gin.ntt.net auth5.ns.gin.ntt.net |
The zone shown is the most specific level that answers an NS query, so a classless delegation may report its parent.