Apex domains cannot have CNAME records.
Question and response
Question
dig hostmar.com. NS
Answer
hostmar.com. 5 NS ns1.hostmar.com.
hostmar.com. 5 NS ns2.hostmar.com.
Authority
The response has no authority records.
Additional
ns1.hostmar.com. 5 A 200.58.112.193
ns2.hostmar.com. 5 A 200.58.112.101
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0