sip.nitronet.pl has no NS records.
NS records for this zone are defined at nitronet.pl.
NS records for this zone are defined at nitronet.pl.
Question and response
Question
dig sip.nitronet.pl. NS
Answer
The response has no answer records.
Authority
nitronet.pl. 3600 SOA dns.nitronet.pl. hostmaster.nitronet.pl. 2025022005 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0