mx.faktor2.ru has one IP number , but the reverse is mu-in-f27.1e100.net. 1e.ca, mx2.z51.fr, sagaci.com, mx2.ctrl.it, g.mx.vntx.net and at least 100 other hosts point to the same IP. faktor2.ru use this as a mailserver. faktor2.ru is a domain controlled by two nameservers at faktor2.ru themselves. They are on different IP networks. Incoming mail for faktor2.ru is handled by eight mailservers having a total of 27 IP numbers. There are two duplicated IP numbers. Some of them are on the same IP network. faktor2.ru has one IP number. mx.faktor2.ru is hosted on a server in United States even though the hostname implies Russian Federation.