ns6.so.cg.shawcable.net has no CNAME records.
Question and response
Question
dig ns6.so.cg.shawcable.net. NS
Answer
The response has no answer records.
Authority
so.cg.shawcable.net. 600 SOA ns1.so.cg.shawcable.net. dnsadmin.shaw.ca. 243 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0