Apex domains cannot have CNAME records.
Question and response
Question
dig freepro.com. NS
Answer
freepro.com. 5 NS ns1.as30781.net.
freepro.com. 5 NS ns2.as30781.net.
Authority
The response has no authority records.
Additional
ns1.as30781.net. 5 A 85.31.192.1
ns2.as30781.net. 5 A 85.31.193.1
ns1.as30781.net. 5 AAAA 2a01:240:2:0:0:0:0:2
ns2.as30781.net. 5 AAAA 2a01:240:3:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0