wp-x.jp.		30 IN SOA ns1.wpx.ne.jp. root.wpx.ne.jp. (
				0          ; serial
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

Name servers:
wp-x.jp.		30 IN NS ns3.wpx.ne.jp.
wp-x.jp.		30 IN NS ns1.wpx.ne.jp.
wp-x.jp.		30 IN NS ns2.wpx.ne.jp.