Apex domains cannot have CNAME records.
Question and response
Question
dig 65.16.194.in-addr.arpa. NS
Answer
65.16.194.in-addr.arpa. 2 NS dns2.telia.com.
65.16.194.in-addr.arpa. 2 NS dns1.telia.com.
Authority
The response has no authority records.
Additional
dns1.telia.com. 2 A 81.228.11.67
dns2.telia.com. 2 A 81.228.10.67
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0