Apex domains cannot have CNAME records.
Question and response
Question
dig 1net.by. NS
Answer
1net.by. 4 NS ns1.1net.by.
1net.by. 4 NS ns2.1net.by.
Authority
The response has no authority records.
Additional
ns1.1net.by. 4 A 93.125.121.69
ns2.1net.by. 4 A 79.98.48.132
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0