ns3.domainnetwork.com has no CNAME records.
Question and response
Question
dig ns3.domainnetwork.com. NS
Answer
The response has no answer records.
Authority
domainnetwork.com. 59798 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2013080840 14400 3600 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0