c-73-243-2-119.hsd1.co.comcast.net has no CNAME records.
Question and response
Question
dig c-73-243-2-119.hsd1.co.comcast.net. NS
Answer
The response has no answer records.
Authority
hsd1.co.comcast.net. 870 SOA dns101.comcast.net. dnsadmin.comcast.net. 12636794 7200 3600 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0