ns2.dplanet.ch has one IP number , via cname to ns2.sunrise.ch , which also has a corresponding reverse pointer. ns2.access.ch and i.ns.swinog.ch point to the same IP. wernerundco.com use this as a nameserver. dplanet.ch is a domain controlled by four nameservers at sunrise.ch. All of them are on different IP networks. Incoming mail for dplanet.ch is handled by two mailservers. Two mailservers have the same IP number. ns2.dplanet.ch is hosted on a server in Switzerland.