mail.sounddsl.com has no NS records.
NS records for this zone are defined at sounddsl.com.
NS records for this zone are defined at sounddsl.com.
Question and response
Question
dig mail.sounddsl.com. NS
Answer
The response has no answer records.
Authority
sounddsl.com. 86400 SOA ns-1.nuoz.net. postmaster.nwnexus.com. 2022122900 7200 3600 864000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0