mx.beepweb.net has no NS records.
NS records for this zone are defined at beepweb.net.
NS records for this zone are defined at beepweb.net.
Question and response
Question
dig mx.beepweb.net. NS
Answer
The response has no answer records.
Authority
beepweb.net. 1800 SOA ns0.beepweb.net. hostmaster.beepweb.net. 2025082801 3600 900 1209600 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0