mx.msn.com has one IP number , via cname to msn.com.mx , but the reverse is msn.co.cr. msn.cl, msn.ca, t1msn.com, msn.co.cr, www.msn.cl and at least 46 other hosts point to the same IP. dove.mx.msn.com and mobile.mx.msn.com are subdomains to this hostname. msn.com is a domain controlled by five nameservers at msft.net. All of them are on different IP networks. Incoming mail for msn.com is handled by four mailservers having a total of twelve IP numbers. There are 36 duplicated IP numbers. Some of them are on the same IP network. msn.com has one IP number. mx.msn.com is hosted on a server in United States.