dnstracer -q soa -o www.hello.com

 |\___ ns1.google.com [hello.com] (216.239.32.10) Got authoritative answer [received type is cname] 
 |\___ ns4.google.com [hello.com] (216.239.38.10) Got authoritative answer [received type is cname] 
 |\___ ns3.google.com [hello.com] (216.239.36.10) Got authoritative answer [received type is cname] 
  \___ ns2.google.com [hello.com] (216.239.34.10) Got authoritative answer [received type is cname] 

ns2.google.com (216.239.34.10)          www.hello.com -> hello.com
ns2.google.com (216.239.34.10)          hello.com -> serial: 2006120100 mname: ns1.google.com rname: dns-admin.google.com
ns3.google.com (216.239.36.10)          www.hello.com -> hello.com
ns3.google.com (216.239.36.10)          hello.com -> serial: 2006120100 mname: ns1.google.com rname: dns-admin.google.com
ns4.google.com (216.239.38.10)          www.hello.com -> hello.com
ns4.google.com (216.239.38.10)          hello.com -> serial: 2006120100 mname: ns1.google.com rname: dns-admin.google.com
ns1.google.com (216.239.32.10)          www.hello.com -> hello.com
ns1.google.com (216.239.32.10)          hello.com -> serial: 2006120100 mname: ns1.google.com rname: dns-admin.google.com