mx.nameweb.biz has no NS records.
NS records for this zone are defined at nameweb.biz.
NS records for this zone are defined at nameweb.biz.
Question and response
Question
dig mx.nameweb.biz. NS
Answer
The response has no answer records.
Authority
nameweb.biz. 901 SOA ns.nscluster.us. hostmaster.nscluster.us. 2026031201 7200 3600 1209600 901
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0