mail.eclass.com.ua has one IP number , but the reverse is s4.uahoster.com. cyxa.net, efir.biz, gfog.net, see.in.ua, tv7.com.ua and at least 100 other hosts point to the same IP. eclass.com.ua is delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. All of them are on different IP networks. Incoming mail for eclass.com.ua is handled by one mailserver at com.ua. eclass.com.ua has one IP number. mail.eclass.com.ua is hosted on a server in United States even though the hostname implies Ukraine.