DNS delegation of com.s9b2.psmtp.co updated: May 21, 2013 2:25:27 PM
Delegation
step
query
auth
servers
1
com.s9b2.psmtp.co.
.
(k,i,h,b,c,d,e,j,m,f,a,l,g).root-servers.net.
2
com.s9b2.psmtp.co.
co.
(ns1,ns3,ns4,ns5,ns2,ns6).cctld.co.
3
com.s9b2.psmtp.co.
psmtp.co.
(ns2,ns1).csof.net.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about com.s9b2.psmtp.co and learn that co is delegated to six name servers (2), so we ask ns1.cctld.co where we learn that psmtp.co is delegated to two name servers, including ns2.csof.net (3), so we ask that one and get the following answer: