mail.karcag.net has one IP number , which is the same as for karcag.net, but the reverse is tux.hu. tux.hu, oske.hu, doza.hu, hubay.hu, no-ip.hu and at least 100 other hosts point to the same IP. karcag.net use this as a mailserver. karcag.net is a domain controlled by three nameservers having a total of four IP numbers. All of them are on different IP networks. Incoming mail for karcag.net is handled by one mailserver at karcag.net themselves. mail.karcag.net is hosted on a server in Hungary.