Apex domains cannot have CNAME records.
Question and response
Question
dig integralsupport.com. NS
Answer
integralsupport.com. 5 NS ns-1130.awsdns-13.org.
integralsupport.com. 5 NS ns-849.awsdns-42.net.
integralsupport.com. 5 NS ns-483.awsdns-60.com.
integralsupport.com. 5 NS ns-1909.awsdns-46.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0