Apex domains cannot have CNAME records.
Question and response
Question
dig usta.com. NS
Answer
usta.com. 5 NS ns1.ispnet.net.
usta.com. 5 NS ns4.ispnet.net.
usta.com. 5 NS ns3.ispnet.net.
usta.com. 5 NS ns2.ispnet.net.
usta.com. 5 NS ns1-adonis.usta.com.
Authority
The response has no authority records.
Additional
ns1.ispnet.net. 5 A 199.224.0.146
ns2.ispnet.net. 5 A 199.224.0.154
ns3.ispnet.net. 5 A 204.141.40.135
ns4.ispnet.net. 5 A 100.8.228.75
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0