mail.topo.net has one IP number , but the reverse is mail.websight.nl. mail.bfn.com, mail.kredo.nl, mail.joba.net, mail.hoeks.com, mail.pcprof.nl and at least 49 other hosts point to the same IP. topo.net use this as a mailserver. topo.net is delegated to three nameservers, however all three delegated nameservers are missing in the zone and three other nameservers are listed instead. Some of them are on the same IP network. Incoming mail for topo.net is handled by two mailservers at nl.intouch.nl having a total of three IP numbers. Two of them are on the same IP network. topo.net has one IP number. mail.topo.net is hosted on a server in Netherlands.