Apex domains cannot have CNAME records.
Question and response
Question
dig papertradelinks.com. NS
Answer
papertradelinks.com. 2 NS sns399.hostgator.in.
papertradelinks.com. 2 NS sns400.hostgator.in.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0