mx01.atman.pl has no NS records.
NS records for this zone are defined at atman.pl.
NS records for this zone are defined at atman.pl.
Question and response
Question
dig mx01.atman.pl. NS
Answer
The response has no answer records.
Authority
atman.pl. 43200 SOA dns.atman.pl. noc.atm.com.pl. 2026021602 3600 600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0