Apex domains cannot have CNAME records.
Question and response
Question
dig sciquest.com. NS
Answer
sciquest.com. 5 NS ns-335.awsdns-41.com.
sciquest.com. 5 NS ns-1779.awsdns-30.co.uk.
sciquest.com. 5 NS ns-1044.awsdns-02.org.
sciquest.com. 5 NS ns-955.awsdns-55.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0