mail2.redomo.cz has one IP number , but the reverse is ns2.pipni.cz. ns2.jikos.cz, ns2.pipni.cz, ns2.machin.cz, dns2.pipni.cz, ns2.tekila.sk and at least 21 other hosts point to the same IP. redomo.cz use this as a mailserver. redomo.cz is delegated to four nameservers, however one extra nameserver is listed in the zone. All nameservers are at gigant.cz. Two nameservers have the same IP number. All of them are on the same IP network. Incoming mail for redomo.cz is handled by two mailservers at redomo.cz themselves. They are on different IP networks. redomo.cz has one IP number. mail2.redomo.cz is hosted on a server in Czech Republic.