Apex domains cannot have CNAME records.
Question and response
Question
dig gltaoyi.com. NS
Answer
gltaoyi.com. 4 NS ns-274.awsdns-34.com.
gltaoyi.com. 4 NS ns-789.awsdns-34.net.
gltaoyi.com. 4 NS ns-1262.awsdns-29.org.
gltaoyi.com. 4 NS ns-1320.awsdns-37.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0