Apex domains cannot have CNAME records.
Question and response
Question
dig hiworks.com. NS
Answer
hiworks.com. 5 NS ns-1451.awsdns-53.org.
hiworks.com. 5 NS ns-799.awsdns-35.net.
hiworks.com. 5 NS ns-291.awsdns-36.com.
hiworks.com. 5 NS ns-1988.awsdns-56.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0