ns1.netz-haut.net has one IP number , which also has a corresponding reverse pointer. dns01.win-lux.ch point to the same IP. sgf.de, fwu.de, 7se.biz, sodis.de, vrsta.de and at least 100 other hosts use this as a nameserver. netz-haut.net is a domain controlled by two nameservers at netz-haut.net themselves. They are on different IP networks. Incoming mail for netz-haut.net is handled by one mailserver having a total of three IP numbers. Two of them are on the same IP network. netz-haut.net has one IP number. ns1.netz-haut.net is hosted on a server in Germany.