Apex domains cannot have CNAME records.
Question and response
Question
dig infnityauto.com. NS
Answer
infnityauto.com. 5 NS ns-1777.awsdns-30.co.uk.
infnityauto.com. 5 NS ns-1582.awsdns-05.co.uk.
infnityauto.com. 5 NS ns-534.awsdns-02.net.
infnityauto.com. 5 NS ns-1168.awsdns-18.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0