blog.who.com has one IP number , via cname to au.rc.yahoo.com , but the reverse is fe1.rd.vip.aue.yahoo.com. who.com, tgyh.com.au, y7-mail.com, www.who.com, seven.com.au and at least 100 other hosts point to the same IP. who.com is a domain controlled by five nameservers at yahoo.com. All of them are on different IP networks. Incoming mail for who.com is handled by two mailservers having a total of eleven IP numbers. There are eight duplicated IP numbers. Some of them are on the same IP network. who.com has two IP numbers. They are on different IP networks. blog.who.com is hosted on a server in Asia/Pacific Region.