tri.amu.edu.pl has no NS records.
NS records for this zone are defined at amu.edu.pl.
NS records for this zone are defined at amu.edu.pl.
Question and response
Question
dig www.poznantriathlon.net. NS
Answer
The response has no answer records.
Authority
poznantriathlon.net. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1772035757 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0