Apex domains cannot have CNAME records.
Question and response
Question
dig southimages.com. NS
Answer
southimages.com. 5 NS ns1.southimages.com.
southimages.com. 5 NS ns2.southimages.com.
Authority
The response has no authority records.
Additional
ns1.southimages.com. 5 A 157.254.12.61
ns2.southimages.com. 5 A 185.9.158.51
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0