mail.052.com has two IP numbers. They are on the same IP network. mail.gkm.hr, mail.hwt.hr, mail.gtg.hr, mail.lebi.net, mail.balic.hr and at least 99 other hosts point to the same IP. 052.com use this as a mailserver. 052.com is a domain controlled by two nameservers at paranid.net. They are on different IP networks. Incoming mail for 052.com is handled by one mailserver having a total of two IP numbers. They are on the same IP network. 052.com has one IP number. mail.052.com is hosted on two servers in Germany.