Apex domains cannot have CNAME records.
Question and response
Question
dig hitech-4seniors.com. NS
Answer
hitech-4seniors.com. 3 NS ns-1623.awsdns-10.co.uk.
hitech-4seniors.com. 3 NS ns-1485.awsdns-57.org.
hitech-4seniors.com. 3 NS ns-165.awsdns-20.com.
hitech-4seniors.com. 3 NS ns-1331.awsdns-38.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0