Apex domains cannot have CNAME records.
Question and response
Question
dig hwrn.net. NS
Answer
hwrn.net. 5 NS z.dns.gandi.net.
hwrn.net. 5 NS ns-113-a.gandi.net.
hwrn.net. 5 NS ns-105-b.gandi.net.
hwrn.net. 5 NS ns-241-c.gandi.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0