Apex domains cannot have CNAME records.
Question and response
Question
dig as272786.net. NS
Answer
as272786.net. 4 NS ns2.as272786.net.
as272786.net. 4 NS ns1.as272786.net.
Authority
The response has no authority records.
Additional
ns1.as272786.net. 4 A 132.226.242.55
ns2.as272786.net. 4 A 3.138.230.21
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0