Apex domains cannot have CNAME records.
Question and response
Question
dig instrumrand.com. NS
Answer
instrumrand.com. 2 NS ns2.instrumrand.com.
instrumrand.com. 2 NS ns1.instrumrand.com.
Authority
The response has no authority records.
Additional
ns1.instrumrand.com. 2 A 149.50.96.18
ns2.instrumrand.com. 2 A 149.50.99.109
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0