mx2.filter.localtel.net has no NS records.
NS records for this zone are defined at localtel.net.
NS records for this zone are defined at localtel.net.
Question and response
Question
dig mx2.filter.localtel.net. NS
Answer
The response has no answer records.
Authority
localtel.net. 3600 SOA ns1.nwinternet.com. hostmaster.nwinternet.com. 2026022000 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0