mx1.icm.edu.pl has no NS records.
NS records for this zone are defined at icm.edu.pl.
NS records for this zone are defined at icm.edu.pl.
Question and response
Question
dig mx1.icm.edu.pl. NS
Answer
The response has no answer records.
Authority
icm.edu.pl. 36000 SOA ns.icm.edu.pl. hostmaster.icm.edu.pl. 2026012901 7200 900 604800 36000
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0