ns2.americanis.net has no NS records.
NS records for this zone are defined at americanis.net.
NS records for this zone are defined at americanis.net.
Question and response
Question
dig ns2.americanis.net. NS
Answer
The response has no answer records.
Authority
americanis.net. 300 SOA ns1.americanis.net. root.ns1.americanis.net. 2648872907 10800 900 432000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0