iskrastudio.pl.		30 IN SOA ns1.openprovider.nl. dns.openprovider.eu. (
				2024121502 ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

Name servers:
iskrastudio.pl.		30 IN NS ns1.openprovider.nl.
iskrastudio.pl.		30 IN NS ns2.openprovider.be.
iskrastudio.pl.		30 IN NS ns3.openprovider.eu.