fns2.42.pl has no NS records.
NS records for this zone are defined at 42.pl.
NS records for this zone are defined at 42.pl.
Question and response
Question
dig fns2.42.pl. NS
Answer
The response has no answer records.
Authority
42.pl. 10800 SOA fns1.42.pl. freedns-admin+100854.42.pl. 2100106770 86400 10800 3628800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0