7.148.159.in-addr.arpa is a domain controlled by two nameservers at latnet.lv. They are on different IP networks. ff.lv, 24.lv, zl.lv, hi.lv, zp.lv and at least 100 other hosts share nameservers with this domain. 148.159.in-addr.arpa is delegated to three nameservers, however one delegated nameserver is missing in the zone. Two of them are on the same IP network.