177-171-6-152.user.vivozap.com.br has no CNAME records.
Question and response
Question
dig 177-171-6-152.user.vivozap.com.br. NS
Answer
The response has no answer records.
Authority
vivozap.com.br. 2776 SOA pinheiros2.vivo.com.br. root.vivo.com.br. 2006090405 10200 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0