ns03.sylinx-rz.de has one IP number , via cname to ns3.knipp.de , which also has a corresponding reverse pointer. sylinx-rz.de is a domain controlled by two nameservers at hans.hosteurope.de. They are on different IP networks. Incoming mail for sylinx-rz.de is handled by two mailservers. Two mailservers have the same IP number. sylinx-rz.de has one IP number. ns03.sylinx-rz.de is hosted on a server in Germany.