Apex domains cannot have CNAME records.
Question and response
Question
dig globalngonetwork.com. NS
Answer
globalngonetwork.com. 5 NS ns2.globalngonetwork.com.
globalngonetwork.com. 5 NS ns1.globalngonetwork.com.
Authority
The response has no authority records.
Additional
ns1.globalngonetwork.com. 5 A 192.3.185.50
ns2.globalngonetwork.com. 5 A 172.245.209.89
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0