We pick m.root-servers.net, one of the 13 root servers (1), and ask it about wusys.de and learn that de is delegated to six name servers (2), so we ask z.nic.de where we learn that wusys.de is delegated to three name servers, including ns8.routing.net (3), so we ask that one and get the following answer:
Wusys.de is a domain controlled by three domain name servers at routing.net. Two of them are on the same IP network. Incoming mail for wusys.de is handled by one mail server at frontbridge.com having a total of seven IP numbers. Some of them are on the same IP network. Wusys.de has one IP number (93.187.234.102), but the reverse is jweiland84.net.
The two IP numbers 2a00:1158:0:404:8799::1 and 93.187.234.102 together
There are about seventy host names that point to the two IP numbers 2a00:1158:0:404:8799::1 and 93.187.234.102 together, hereafter referred to as "IP group 1".