ns1.hdsnet.hu has one IP number , which also has a corresponding reverse pointer. ahoy.ro, digi.tv, dmcc.hu, emktv.hu, jatek.ro and at least 100 other hosts use this as a nameserver. hdsnet.hu is a domain controlled by two nameservers at hdsnet.hu themselves. They are on different IP networks. Incoming mail for hdsnet.hu is handled by one mailserver at digicable.hu. hdsnet.hu has one IP number. ns1.hdsnet.hu is hosted on a server in Hungary.