23.142.in-addr.arpa is delegated to four nameservers, however one delegated nameserver is missing in the zone. All nameservers are at gov.bc.ca. Two of them are on the same IP network. osbc.ca, nvit.ca, bcmag.ca, nlc.bc.ca, gov.bc.ca and at least 71 other hosts share nameservers with this domain. 142.in-addr.arpa is a domain controlled by seven nameservers at arin.net. All of them are on different IP networks.