Apex domains cannot have CNAME records.
Question and response
Question
dig as45671.net. NS
Answer
as45671.net. 1 NS kate.ns.cloudflare.com.
as45671.net. 1 NS dan.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0