ns8.univie.ac.at has one IP number , which also has a corresponding reverse pointer. gv.at, vix.at, aco.net, sbg2.aco.net, univie.ac.at and at least 36 other hosts use this as a nameserver. univie.ac.at is a domain controlled by five nameservers at univie.ac.at themselves. Some of them are on the same IP network. Incoming mail for univie.ac.at is handled by three mailservers also at univie.ac.at. All of them are on the same IP network. univie.ac.at has one IP number. ns8.univie.ac.at is hosted on a server in Germany even though the hostname implies Austria.