cre.jp.			30 IN SOA srv3.cre.ne.jp. root.mail.cre.ne.jp. (
				2021112101 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				3600       ; minimum (1 hour)
				)

cre.jp.			30 IN A	153.120.8.114

Mail exchangers:
cre.jp.			30 IN MX 10 cre.ne.jp.sakura.ne.jp.

Name servers:
cre.jp.			30 IN NS srv3.cre.ne.jp.
cre.jp.			30 IN NS ns1.dns.ne.jp.
cre.jp.			30 IN NS ns2.dns.ne.jp.