Apex domains cannot have CNAME records.
Question and response
Question
dig aw. NS
Answer
aw. 5 NS aw02.setarnet.aw.
aw. 5 NS ns1.dns.aw.
aw. 5 NS ns4.dns.aw.
aw. 5 NS ns3.dns.aw.
aw. 5 NS aw01.setarnet.aw.
Authority
The response has no authority records.
Additional
ns1.dns.aw. 143234 A 194.0.28.2
ns3.dns.aw. 137293 A 194.0.25.25
ns4.dns.aw. 142599 A 185.159.199.201
aw01.setarnet.aw. 137209 A 201.229.0.26
aw02.setarnet.aw. 131855 A 201.229.0.27
ns1.dns.aw. 143234 AAAA 2001:678:2c:0:194:0:28:2
ns3.dns.aw. 137293 AAAA 2001:678:20:0:0:0:0:25
ns4.dns.aw. 142599 AAAA 2620:10a:80ac:0:0:0:0:201
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0