Apex domains cannot have CNAME records.
Question and response
Question
dig swiftrfp.com. NS
Answer
swiftrfp.com. 5 NS dns1.swiftrfp.net.
swiftrfp.com. 5 NS dns2.swiftrfp.net.
Authority
The response has no authority records.
Additional
dns1.swiftrfp.net. 5 A 23.150.248.43
dns2.swiftrfp.net. 5 A 23.150.248.43
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0