Apex domains cannot have CNAME records.
Question and response
Question
dig 4net.tv. NS
Answer
4net.tv. 4 NS ns0.4net.tv.
4net.tv. 4 NS ns1.4net.tv.
Authority
The response has no authority records.
Additional
ns0.4net.tv. 4 A 91.222.55.50
ns1.4net.tv. 4 A 141.95.127.100
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0