bitbox.jp.		30 IN SOA master.dns.ne.jp. tech.sakura.ad.jp. (
				2018062018 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				3600000    ; expire (5 weeks 6 days 16 hours)
				3600       ; minimum (1 hour)
				)

bitbox.jp.		30 IN TXT "v=spf1 a:www3386.sakura.ne.jp mx ~all"

bitbox.jp.		30 IN A	49.212.235.96

Mail exchangers:
bitbox.jp.		30 IN MX 10 bitbox.jp.

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