us.am0.yahoodns.net
DNS delegation of us.am0.yahoodns.net updated: May 18, 2013 11:39:52 PM
Delegation
step query auth servers
1 us.am0.yahoodns.net. . (l,c,f,g,m,d,j,i,k,h,e,a,b).root-servers.net. 2 us.am0.yahoodns.net. net. (m,h,c,j,a,g,d,e,l,k,b,f,i).gtld-servers.net. 3 us.am0.yahoodns.net. yahoodns.net. (ns3,ns1,ns2,ns4,ns5).yahoo.com. 4 us.am0.yahoodns.net. am0.yahoodns.net. (yf1,yf2).yahoo.com.
We pick l.root-servers.net , one of the 13 root servers (1), and ask it about us.am0.yahoodns.net and learn that net is delegated to 13 name servers (2), so we ask m.gtld-servers.net where we learn that yahoodns.net is delegated to five name servers, including ns3.yahoo.com (3), so we ask that one and learn that am0.yahoodns.net is delegated to two name servers (4), so we ask yf1.yahoo.com and get the following answer:
Authoritative answer
AUTHORITATIVE for us.am0.yahoodns.net. am0.yahoodns.net. 30 SOA yf1.yahoo.com. hostmaster.yahoo-inc.com. ( 1368920392 30 30 86400 300 )
net. com. yahoo.com. yahoodns.net. ns2.yahoo.com. ns5.yahoo.com. ns1.yahoo.com. ns4.yahoo.com. yf1.yahoo.com. ns3.yahoo.com. yf2.yahoo.com. am0.yahoodns.net. 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. 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. us.am0.yahoodns.net.
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