Apex domains cannot have CNAME records.
Question and response
Question
dig as39305.net. NS
Answer
as39305.net. 5 NS dns2.as39305.net.
as39305.net. 5 NS dns1.as39305.net.
Authority
The response has no authority records.
Additional
dns1.as39305.net. 5 A 91.211.64.99
dns2.as39305.net. 5 A 91.211.64.115
dns1.as39305.net. 5 AAAA 2a0c:7144:11:1:0:1:d5:1
dns2.as39305.net. 5 AAAA 2a0c:7144:12:1:0:2:d5:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0