mx.andnlp.com has no NS records.
NS records for this zone are defined at andnlp.com.
NS records for this zone are defined at andnlp.com.
Question and response
Question
dig mx.andnlp.com. NS
Answer
The response has no answer records.
Authority
andnlp.com. 3600 SOA dns.andnlp.com. hostmaster.andnlp.com. 1113663546 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0