centrex.ensite.com.br has no CNAME records.
Question and response
Question
dig centrex.ensite.com.br. NS
Answer
The response has no answer records.
Authority
ensite.com.br. 6926 SOA Cp3.americanet.com.br. postmaster.ensite.com.br. 2026021701 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0