ns1.linenet.com.br has no CNAME records.
Question and response
Question
dig ns1.linenet.com.br. NS
Answer
The response has no answer records.
Authority
linenet.com.br. 3290 SOA ns1.linenet.com.br. suporte.technobox.com.br. 2026012680 4800 3600 1209600 6000
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0