Regarding your update,

I tried following to get "www.yahoo.com" (and Not "f1.us.www.vip.ird.yahoo.com")

That's an odd request because 69.147.76.15 is not associated with www.yahoo.com. In fact, no IP address is.

$ nslookup -norecurse www.yahoo.com
Non-authoritative answer:
www.yahoo.com   canonical name = www.wa1.b.yahoo.com.
[download]

www.yahoo.com is just an alias to another domain. There's no way to find which domains are aliased to a domain name. In part, this is because anyone can alias a domain they own to any domain (even those they don't own).