grimmer.cz.		30 IN SOA ns.web4u.cz. admin.web4u.cz. (
				2024041506 ; serial
				14400      ; refresh (4 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				14400      ; minimum (4 hours)
				)

Name servers:
grimmer.cz.		30 IN NS ns.web4u.cz.
grimmer.cz.		30 IN NS ns2.web4u.cz.