Apex domains cannot have CNAME records.
Question and response
Question
dig QWWG.RU. NS
Answer
QWWG.RU. 3 NS ns2.masterhost.RU.
QWWG.RU. 3 NS ns.masterhost.RU.
QWWG.RU. 3 NS ns1.masterhost.RU.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0