64.194.193.in-addr.arpa is delegated to two nameservers, however one delegated nameserver is missing in the zone and three other nameservers are listed. Two of them are on the same IP network. edu.dz, net.dz, nic.it, gov.dz, com.dz and at least 62 other hosts share nameservers with this domain. dz.64.194.193.in-addr.arpa are subdomains to this hostname.