net.s9b2.psmtp.com
DNS delegation of net.s9b2.psmtp.com updated: Jun 19, 2013 11:55:01 PM
Delegation
step query auth servers 1 net.s9b2.psmtp.com. . (b,c,i,e,a,g,d,k,f,h,l,m,j).root-servers.net. 2 net.s9b2.psmtp.com. com. (m,a,c,h,f,e,k,b,j,d,i,l,g).gtld-servers.net. 3 net.s9b2.psmtp.com. psmtp.com. (ns3,ns2,ns1,ns4).google.com.
We pick b.root-servers.net , one of the 13 root servers (1), and ask it about net.s9b2.psmtp.com and learn that com is delegated to 13 name servers (2), so we ask m.gtld-servers.net where we learn that psmtp.com is delegated to four name servers, including ns3.google.com (3), so we ask that one and get the following answer:
Authoritative answer
AUTHORITATIVE for net.s9b2.psmtp.com. psmtp.com. 60 SOA ns1.google.com. postini-hostmaster.google.com. ( 1524095 7200 3600 3600000 600 )
net. com. psmtp.com. google.com. s9b2.psmtp.com. ns3.google.com. ns4.google.com. ns1.google.com. ns2.google.com. root-servers.net. gtld-servers.net. m.root-servers.net. a.root-servers.net. g.gtld-servers.net. e.gtld-servers.net. j.root-servers.net. i.gtld-servers.net. net.s9b2.psmtp.com. f.gtld-servers.net. m.gtld-servers.net. k.gtld-servers.net. h.root-servers.net. d.root-servers.net. d.gtld-servers.net. i.root-servers.net. h.gtld-servers.net. l.root-servers.net. k.root-servers.net. g.root-servers.net. b.gtld-servers.net. f.root-servers.net. c.gtld-servers.net. c.root-servers.net. a.gtld-servers.net. b.root-servers.net. l.gtld-servers.net. j.gtld-servers.net. e.root-servers.net.
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