Apex domains cannot have CNAME records.
Question and response
Question
dig percipio.com. NS
Answer
percipio.com. 4 NS ns-1649.awsdns-14.co.uk.
percipio.com. 4 NS ns-588.awsdns-09.net.
percipio.com. 4 NS ns-61.awsdns-07.com.
percipio.com. 4 NS ns-1047.awsdns-02.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0