dns2.insidesign.com.br has no CNAME records.
Question and response
Question
dig dns2.insidesign.com.br. NS
Answer
The response has no answer records.
Authority
insidesign.com.br. 8021 SOA dns1.insidesign.com.br. alerta\.servidor.insidesign.com.br. 2026022402 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0