dns.pipni.cz has one IP number , which is the same as for pipni.cz, via cname to ns.pipni.cz , which also has a corresponding reverse pointer. pipni.cz, pipni.com, pipni.net, vserver.cz, pipni.info and at least 39 other hosts point to the same IP. pipni.cz is a domain controlled by three nameservers at pipni.cz themselves. Two of them are on the same IP network. Incoming mail for pipni.cz is handled by two mailservers also at pipni.cz. They are on different IP networks. dns.pipni.cz is hosted on a server in Czech Republic.