mta4-2.rmh1.net has no NS records.
NS records for this zone are defined at rmh1.net.
NS records for this zone are defined at rmh1.net.
Question and response
Question
dig mta4-2.rmh1.net. NS
Answer
The response has no answer records.
Authority
rmh1.net. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010182 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0