Apex domains cannot have CNAME records.
Question and response
Question
dig hmmag.com. NS
Answer
hmmag.com. 4 NS ns-1022.awsdns-63.net.
hmmag.com. 4 NS ns-1850.awsdns-39.co.uk.
hmmag.com. 4 NS ns-288.awsdns-36.com.
hmmag.com. 4 NS ns-1789.awsdns-31.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0