mail.adt.ru has one IP number , via cname to ghs.google.com , but the reverse is vw-in-f121.1e100.net. mecog.de, jswmail.com, asp-pro.com, mail.dmc.tv, mail.tma.org and at least 100 other hosts point to the same IP. lisk2.krutilka.ru use this as a mailserver. adt.ru is a domain controlled by two nameservers at adt.ru themselves. They are on different IP networks. Incoming mail for adt.ru is handled by seven mailservers having a total of 28 IP numbers. Some of them are on the same IP network. adt.ru has one IP number. mail.adt.ru is hosted on a server in United States even though the hostname implies Russian Federation.