yyyworld.net.		30 IN SOA ns1.myhostadmin.net. dnsconct.myhostadmin.net. (
				2015051420 ; serial
				43200      ; refresh (12 hours)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

Name servers:
yyyworld.net.		30 IN NS ns6.myhostadmin.net.
yyyworld.net.		30 IN NS ns1.myhostadmin.net.
yyyworld.net.		30 IN NS ns4.myhostadmin.net.
yyyworld.net.		30 IN NS ns2.myhostadmin.net.
yyyworld.net.		30 IN NS ns3.myhostadmin.net.
yyyworld.net.		30 IN NS ns5.myhostadmin.net.