chem7.net.		30 IN SOA master.dns.ne.jp. tech.sakura.ad.jp. (
				2005011511 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				3600000    ; expire (5 weeks 6 days 16 hours)
				3600       ; minimum (1 hour)
				)

chem7.net.		30 IN A	202.181.99.28

Mail exchangers:
chem7.net.		30 IN MX 10 chem7.net.

Name servers:
chem7.net.		30 IN NS ns1.dns.ne.jp.
chem7.net.		30 IN NS ns2.dns.ne.jp.