Apex domains cannot have CNAME records.
Question and response
Question
dig internetmax.com.br. NS
Answer
internetmax.com.br. 4 NS ns1.dns-parking.com.
internetmax.com.br. 4 NS ns2.dns-parking.com.
Authority
The response has no authority records.
Additional
ns1.dns-parking.com. 4 A 162.159.24.201
ns2.dns-parking.com. 4 A 162.159.25.42
ns1.dns-parking.com. 4 AAAA 2400:cb00:2049:1:0:0:a29f:18c9
ns2.dns-parking.com. 4 AAAA 2400:cb00:2049:1:0:0:a29f:192a
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0