mailfe7-outbound91.america.net has no NS records.
NS records for this zone are defined at america.net.
NS records for this zone are defined at america.net.
Question and response
Question
dig mailfe7-outbound91.america.net. NS
Answer
The response has no answer records.
Authority
america.net. 3600 SOA auth1.america.net. dns.america.net. 2026030203 3600 600 864000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0