DNS delegation of yf2.yahoo.com updated: May 25, 2013 12:28:02 PM
Delegation
step
query
auth
servers
1
yf2.yahoo.com.
.
(e,i,g,f,m,b,k,a,j,l,d,h,c).root-servers.net.
2
yf2.yahoo.com.
com.
(a,c,d,i,l,e,j,g,k,b,m,h,f).gtld-servers.net.
3
yf2.yahoo.com.
yahoo.com.
(ns4,ns5,ns2,ns1,ns3).yahoo.com.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about yf2.yahoo.com and learn that com is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that yahoo.com is delegated to five name servers, including ns4.yahoo.com (3), so we ask that one and get the following answer:
Incoming mail for yf2.yahoo.com is handled by one mail server at .. We are missing the IP:s of one server: .. Yf2.yahoo.com has one IP number (68.180.130.15), which also has a corresponding reverse pointer.
