ns01.telemar.com.br has no NS records.
NS records for this zone are defined at telemar.com.br.
NS records for this zone are defined at telemar.com.br.
Question and response
Question
dig ns01.telemar.com.br. NS
Answer
The response has no answer records.
Authority
telemar.com.br. 600 SOA venus.telemar.com.br. root.telemar.com.br. 2008070506 3600 600 604800 600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0