dns1.a1.net has one IP number , which also has a corresponding reverse pointer. fuchshuber.com and dns1.telekom.at point to the same IP. a1.net is a domain controlled by three nameservers at a1.net themselves. Two of them are on the same IP network. Incoming mail for a1.net is handled by one mailserver also at a1.net. a1.net has one IP number. dns1.a1.net is hosted on a server in Austria.