Apex domains cannot have CNAME records.
Question and response
Question
dig glumorpez.com. NS
Answer
glumorpez.com. 4 NS ns-605.awsdns-11.net.
glumorpez.com. 4 NS ns-1261.awsdns-29.org.
glumorpez.com. 4 NS ns-1470.awsdns-55.org.
glumorpez.com. 4 NS ns-1678.awsdns-17.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0