faxmx.tpx.net has no NS records.
NS records for this zone are defined at tpx.net.
NS records for this zone are defined at tpx.net.
Question and response
Question
dig faxmx.tpx.net. NS
Answer
The response has no answer records.
Authority
tpx.net. 300 SOA ns1.dsci-net.com. dnsadmin.dsci-net.com. 2026031313 43200 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0