keiyou.jp.		30 IN SOA nsk0.secure.ne.jp. hostmaster.cpi.ad.jp. (
				2510170000 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				3600000    ; expire (5 weeks 6 days 16 hours)
				86400      ; minimum (1 day)
				)

Name servers:
keiyou.jp.		30 IN NS nsk0.secure.ne.jp.
keiyou.jp.		30 IN NS nsk1.secure.ne.jp.