ns3.schlund.de has one IP number , which also has a corresponding reverse pointer. ekl.de, mpg.ag, bnv.de, dsp.de, wedv.de and at least 100 other hosts use this as a nameserver. schlund.de is a domain controlled by two nameservers at schlund.de themselves. They are on the same IP network. Incoming mail for schlund.de is handled by three mailservers also at schlund.de. All of them are on the same IP network. schlund.de has one IP number. ns3.schlund.de is hosted on a server in Germany.