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$ dig | grep net
.            455744    IN    NS    j.root-servers.net.
.            455744    IN    NS    m.root-servers.net.
.            455744    IN    NS    e.root-servers.net.
.            455744    IN    NS    f.root-servers.net.
.            455744    IN    NS    k.root-servers.net.
.            455744    IN    NS    i.root-servers.net.
.            455744    IN    NS    d.root-servers.net.
.            455744    IN    NS    h.root-servers.net.
.            455744    IN    NS    g.root-servers.net.
.            455744    IN    NS    c.root-servers.net.
.            455744    IN    NS    a.root-servers.net.
.            455744    IN    NS    b.root-servers.net.
.            455744    IN    NS    l.root-servers.net.
$ dig | grep net | wc
     13      65     481
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