ns01.netecom.com.br has no NS records.
NS records for this zone are defined at netecom.com.br.
NS records for this zone are defined at netecom.com.br.
Question and response
Question
dig ns01.netecom.com.br. NS
Answer
The response has no answer records.
Authority
netecom.com.br. 3600 SOA ns01.netecom.com.br. admin.netecom.com.br. 2026022508 10800 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0