207.13.193.in-addr.arpa is delegated to three nameservers, however two delegated nameservers are missing in the zone and one other nameserver is listed. Two nameservers have the same IP number. Two of them are on the same IP network. lfv.se, svea.fi, hojab.se, daloc.se, ports.se and at least 57 other hosts share nameservers with this domain. 13.193.in-addr.arpa is a domain controlled by four nameservers. All of them are on different IP networks.