Apex domains cannot have CNAME records.
Question and response
Question
dig paco.net. NS
Answer
paco.net. 5 NS ns.paco.net.
paco.net. 5 NS ns2.paco.net.
Authority
The response has no authority records.
Additional
ns.paco.net. 5 A 195.114.128.50
ns2.paco.net. 5 A 195.114.128.22
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0