Apex domains cannot have CNAME records.
Question and response
Question
dig dbnet.com.vc. NS
Answer
dbnet.com.vc. 5 NS anna.ns.cloudflare.com.
dbnet.com.vc. 5 NS porter.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0