mail.polcom.com.pl has no NS records.
NS records for this zone are defined at polcom.com.pl.
NS records for this zone are defined at polcom.com.pl.
Question and response
Question
dig mail.polcom.com.pl. NS
Answer
The response has no answer records.
Authority
polcom.com.pl. 900 SOA ns1.polcom.com.pl. dnsadmin.polcom.com.pl. 2026021801 10800 3600 1814400 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0