cntfiber.net.br has no TXT records.
Question and response
Question
dig cntfiber.net.br. TXT
Answer
The response has no answer records.
Authority
cntfiber.net.br. 3600 SOA ns1.udns.com.br. noc.cntfiber.net.br. 2019031116 10800 900 604800 86400
Additional
. 0 OPT [{Extended_DNS_Error: PROHIBITED}] ; payload 1232, xrcode 0, version 0, flags 0