dns3.telekom.at has one IP number , which also has a corresponding reverse pointer. dns3.a1.net point to the same IP. 3-g.at, pfs.at, hdt.at, aue.at, vip.at and at least 100 other hosts use this as a nameserver. telekom.at is a domain controlled by three nameservers at telekom.at themselves. All of them are on different IP networks. Incoming mail for telekom.at is handled by one mailserver also at telekom.at. telekom.at has one IP number. dns3.telekom.at is hosted on a server in Austria.