Apex domains cannot have CNAME records.
Question and response
Question
dig xitens.net. NS
Answer
xitens.net. 1 NS ns2.xitens.net.
xitens.net. 1 NS ns1.xitens.net.
Authority
The response has no authority records.
Additional
ns1.xitens.net. 1 A 84.244.138.10
ns2.xitens.net. 1 A 217.148.161.186
ns1.xitens.net. 1 AAAA 2001:15c8:11:2:0:0:0:10
ns2.xitens.net. 1 AAAA 2001:15c8:11:3:0:0:0:186
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0