mail.neogen.rs has three IP numbers. All of them are on the same IP network. This hostname cnames to rrr.neogen.ro. faces.md, 2a.noi2.ro, impulse.bg, www.noi2.ro, www.love.bg and at least 23 other hosts point to the same IP. neogen.rs is a domain controlled by two nameservers at neogen.biz. They are on the same IP network. Incoming mail for neogen.rs is handled by one mailserver also at neogen.biz. neogen.rs has three IP numbers. All of them are on the same IP network. mail.neogen.rs is hosted on three servers in Romania even though the hostname implies Serbia.