Apex domains cannot have CNAME records.
Question and response
Question
dig nic.pa. NS
Answer
nic.pa. 5 NS ns2.nic.pa.
nic.pa. 5 NS ss-ns.nic.pa.
nic.pa. 5 NS ns.nic.pa.
nic.pa. 5 NS ns1.nic.pa.
Authority
The response has no authority records.
Additional
ns.nic.pa. 5 A 168.77.9.6
ns1.nic.pa. 5 A 168.77.9.7
ns2.nic.pa. 5 A 168.77.9.8
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0