customer-197-180.porta.net has no NS records.
NS records for this zone are defined at porta.net.
NS records for this zone are defined at porta.net.
Question and response
Question
dig customer-197-180.porta.net. NS
Answer
The response has no answer records.
Authority
porta.net. 900 SOA dns1.porta.net. hostmaster.claro.com.ec. 374 28800 18000 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0