ns2.brava.net.br has no CNAME records.
Question and response
Question
dig ns2.brava.net.br. NS
Answer
The response has no answer records.
Authority
brava.net.br. 2313 SOA ns1.brava.net.br. root.brava.net.br. 2026020948 4800 3600 1209600 6000
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0