Apex domains cannot have CNAME records.
Question and response
Question
dig icloudtech.dev. NS
Answer
icloudtech.dev. 3 NS ns1.mastertel.ru.
icloudtech.dev. 3 NS ns3.mastertel.ru.
Authority
The response has no authority records.
Additional
ns1.mastertel.ru. 3 A 217.67.178.162
ns3.mastertel.RU. 3 A 178.238.117.124
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0