Apex domains cannot have CNAME records.
Question and response
Question
dig csinsurancesolutions.com. NS
Answer
csinsurancesolutions.com. 5 NS ns1.csinsurancesolutions.com.
csinsurancesolutions.com. 5 NS ns2.csinsurancesolutions.com.
Authority
The response has no authority records.
Additional
ns1.csinsurancesolutions.com. 5 A 38.226.247.170
ns2.csinsurancesolutions.com. 5 A 38.226.247.173
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0