ns1.geneos.de has one IP number. urbs.de, brrv.net, tecos.de, geneos.de, picard.de and at least 62 other hosts use this as a nameserver. geneos.de is a domain controlled by two nameservers at geneos.de themselves. They are on different IP networks. Incoming mail for geneos.de is handled by two mailservers also at geneos.de. They are on the same IP network. ns1.geneos.de is hosted on a server in United Kingdom even though the hostname implies Germany.