waent.oi.com.br has no NS records.
NS records for this zone are defined at oi.com.br.
NS records for this zone are defined at oi.com.br.
Question and response
Question
dig whatsEnterprisePRD-LB-2053276421.us-west-2.elb.amazonaws.com. NS
Answer
The response has no answer records.
Authority
us-west-2.elb.amazonaws.com. 60 SOA ns-332.awsdns-41.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 60
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0