Apex domains cannot have CNAME records.
Question and response
Question
dig tigerbergboerboels.com. NS
Answer
tigerbergboerboels.com. 5 NS ns-427.awsdns-53.com.
tigerbergboerboels.com. 5 NS ns-181.awsdns-22.com.
tigerbergboerboels.com. 5 NS ns-1649.awsdns-14.co.uk.
tigerbergboerboels.com. 5 NS ns-453.awsdns-56.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0