Apex domains cannot have CNAME records.
Question and response
Question
dig nktele.com. NS
Answer
nktele.com. 5 NS ns1.any-cdns.net.
nktele.com. 5 NS ns2.any-cdns.net.
Authority
The response has no authority records.
Additional
ns1.any-cdns.net. 5 A 94.156.2.15
ns2.any-cdns.net. 5 A 94.156.2.16
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0