mail.phonesystems.net has no NS records.
NS records for this zone are defined at phonesystems.net.
NS records for this zone are defined at phonesystems.net.
Question and response
Question
dig mail.phonesystems.net. NS
Answer
The response has no answer records.
Authority
phonesystems.net. 3600 SOA ns1.phonesystems.net. mail.phonesystems.net. 2025072801 3600 900 1700000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0