hostmaster.dlcenter.com.br has no CNAME records.
Question and response
Question
dig hostmaster.dlcenter.com.br. NS
Answer
The response has no answer records.
Authority
dlcenter.com.br. 291 SOA dlcenter.com.br. root.dlcenter.com.br. 2025120301 43200 3600 1814400 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0