ns2.csu.net has one IP number , which also has a corresponding reverse pointer. ns3.cuesta.org, ns3.cuesta.edu, ns2.socccd.cc.ca.us and ns3.cuesta.cc.ca.us point to the same IP. rop.cc, dvc.edu, metv.ws, vvc.edu, avc.edu and at least 100 other hosts use this as a nameserver. csu.net is delegated to three nameservers, however eight extra nameservers are listed in the zone. There are seven duplicated IP numbers. Some of them are on the same IP network. Incoming mail for csu.net is handled by two mailservers at calstate.edu. They are on different IP networks. csu.net has one IP number. ns2.csu.net is hosted on a server in United States.