ns2.hadcloudservers.com.br has no CNAME records.
Question and response
Question
dig ns2.hadcloudservers.com.br. NS
Answer
The response has no answer records.
Authority
hadcloudservers.com.br. 900 SOA cloud-dns01.hadcloud.srv.br. noc.hadcloud.com.br. 2021683507 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0