mail.parspack.co has no NS records.
NS records for this zone are defined at parspack.co.
NS records for this zone are defined at parspack.co.
Question and response
Question
dig mail.parspack.co. NS
Answer
The response has no answer records.
Authority
parspack.co. 3600 SOA ns21.cloudns.net. support.cloudns.net. 2022102605 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0