ns2.sunrise.ch has one IP number , which also has a corresponding reverse pointer. ns2.access.ch and ns2.dplanet.ch cnames to this hostname. i.ns.swinog.ch point to the same IP. mdh.hn, efp.cc, tep.ch, iec.ch, idg.ch and at least 100 other hosts use this as a nameserver. sunrise.ch is a domain controlled by four nameservers at sunrise.ch themselves. All of them are on different IP networks. Incoming mail for sunrise.ch is handled by two mailservers also at sunrise.ch. Two mailservers have the same IP number. sunrise.ch has one IP number. ns2.sunrise.ch is hosted on a server in Switzerland.