dns2.cscdns.net has no CNAME records.
Question and response
Question
dig dns2.cscdns.net. NS
Answer
The response has no answer records.
Authority
cscdns.net. 8347 SOA udns1.cscdns.net. hostmaster.cscdns.net. 2007080919 28800 7200 604800 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0