DNS delegation of mail3a.citco.com updated: May 25, 2013 5:10:32 AM
Delegation
step
query
auth
servers
1
mail3a.citco.com.
.
(i,g,c,f,d,m,b,h,k,l,e,j,a).root-servers.net.
2
mail3a.citco.com.
com.
(f,d,a,k,e,g,m,b,i,h,j,l,c).gtld-servers.net.
3
mail3a.citco.com.
citco.com.
(auth40,auth62).ns.uu.net.
We pick i.root-servers.net, one of the 13 root servers (1), and ask it about mail3a.citco.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that citco.com is delegated to two name servers, including auth40.ns.uu.net (3), so we ask that one and get the following answer: