Apex domains cannot have CNAME records.
Question and response
Question
dig vps.dticcne.com. NS
Answer
vps.dticcne.com. 5 NS ns2.domains.com2.
vps.dticcne.com. 5 NS ns1.domains.com2.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0