ns1.aventus.de has one IP number , but the reverse is ns1.dnsresolve.net. ns3.jh9.de, ns1.nlg.ro, ns1.jh9.de, ns1.dhsl.de, ns3.dhsl.de and at least 70 other hosts point to the same IP. aventus.de use this as a nameserver. aventus.de is delegated to two nameservers, however one delegated nameserver is missing in the zone and one other nameserver is listed instead. Two nameservers have the same IP number. Some of them are on the same IP network. Incoming mail for aventus.de is handled by one mailserver at aventus.de themselves. aventus.de has one IP number , but the reverse is aventus.net. ns1.aventus.de is hosted on a server in Germany.