mx4.ispservices.us has no NS records.
NS records for this zone are defined at ispservices.us.
NS records for this zone are defined at ispservices.us.
Question and response
Question
dig mx4.ispservices.us. NS
Answer
The response has no answer records.
Authority
ispservices.us. 60 SOA ns1.ispservices.us. hostmaster.ispservices.us. 2025120301 3600 600 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0