Apex domains cannot have CNAME records.
Question and response
Question
dig hdomestic.com. NS
Answer
hdomestic.com. 5 NS ns1.hdomestic.com.
hdomestic.com. 5 NS ns2.hdomestic.com.
Authority
The response has no authority records.
Additional
ns1.hdomestic.com. 5 A 62.171.142.121
ns2.hdomestic.com. 5 A 62.169.19.112
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0