ns1.aarnet.net.au has one IP number , which also has a corresponding reverse pointer. csiro.au, vpac.org, ntu.edu.au, naa.gov.au, ecu.edu.au and at least 93 other hosts use this as a nameserver. aarnet.net.au is a domain controlled by three nameservers at aarnet.net.au themselves. All of them are on the same IP network. Incoming mail for aarnet.net.au is handled by two mailservers having a total of five IP numbers. There are five duplicated IP numbers. Some of them are on the same IP network. aarnet.net.au has one IP number. ns1.aarnet.net.au is hosted on a server in Australia.