Apex domains cannot have CNAME records.
Question and response
Question
dig intervistanetworking.com. NS
Answer
intervistanetworking.com. 5 NS ns1.intervistanetworking.com.
intervistanetworking.com. 5 NS ns2.intervistanetworking.com.
Authority
The response has no authority records.
Additional
ns1.intervistanetworking.com. 5 A 170.62.105.130
ns2.intervistanetworking.com. 5 A 147.161.3.70
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0