2.100.190.in-addr.arpa is a domain controlled by four nameservers at vtr.net. Two of them are on the same IP network. mi.cl, 111.cl, vtr.cl, vtr.net, cgp.mi.cl and at least 60 other hosts share nameservers with this domain. 100.190.in-addr.arpa is delegated to two nameservers, however one extra nameserver is listed in the zone. All nameservers are also at vtr.net. All of them are on different IP networks.