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