Apex domains cannot have CNAME records.
Question and response
Question
dig kota.net. NS
Answer
kota.net. 5 NS bertha.kota.net.
kota.net. 5 NS ns.kota.net.
kota.net. 5 NS offsite.kota.net.
Authority
The response has no authority records.
Additional
ns.kota.net. 5 A 205.237.128.3
bertha.kota.net. 5 A 205.237.135.2
offsite.kota.net. 5 A 40.87.87.184
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0