Apex domains cannot have CNAME records.
Question and response
Question
dig dinaserver.com. NS
Answer
dinaserver.com. 5 NS ns3.dinahosting.com.
dinaserver.com. 5 NS ns.dinahosting.com.
dinaserver.com. 5 NS ns2.dinahosting.com.
dinaserver.com. 5 NS ns4.dinahosting.com.
Authority
The response has no authority records.
Additional
ns.dinahosting.com. 5 A 185.192.220.10
ns2.dinahosting.com. 5 A 185.192.221.10
ns3.dinahosting.com. 5 A 185.192.222.10
ns4.dinahosting.com. 5 A 185.192.223.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0