ns2.xjx.hu has one IP number , but the reverse is ns2.everydns.net. i521.info, xns7.2x4.ru, ns.ljsf.org, ns.jwdc.org, c.ns.u10r.net and at least 35 other hosts point to the same IP. xjx.hu use this as a nameserver. xjx.hu is a domain controlled by two nameservers at xjx.hu themselves. They are on different IP networks. Incoming mail for xjx.hu is handled by one mailserver also at xjx.hu. xjx.hu has one IP number. ns2.xjx.hu is hosted on a server in United Kingdom even though the hostname implies Hungary.