Apex domains cannot have CNAME records.
Question and response
Question
dig NETROAD.RU. NS
Answer
NETROAD.RU. 2 NS ns1.mts-ws.net.
NETROAD.RU. 2 NS ns3.mts.RU.
NETROAD.RU. 2 NS ns2.mts.RU.
NETROAD.RU. 2 NS ns4.mts-ws.net.
Authority
The response has no authority records.
Additional
ns1.mts-ws.net. 2 A 213.87.16.43
ns4.mts-ws.net. 2 A 217.8.236.228
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0