pingable.amnic.net has no NS records.
NS records for this zone are defined at amnic.net.
NS records for this zone are defined at amnic.net.
Question and response
Question
dig pingable.amnic.net. NS
Answer
The response has no answer records.
Authority
amnic.net. 14400 SOA ns-pri.amnic.net. dns.amnic.net. 1770637756 43200 7200 1209600 14400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0