world-walker.jp.	30 IN SOA ns1.value-domain.com. hostmaster.world-walker.jp. (
				2020082618 ; serial
				3600       ; refresh (1 hour)
				900        ; retry (15 minutes)
				604800     ; expire (1 week)
				1200       ; minimum (20 minutes)
				)

world-walker.jp.	30 IN TXT "v=spf1 ip4:160.251.151.180 ~all"

world-walker.jp.	30 IN A	160.251.151.180

Mail exchangers:
world-walker.jp.	30 IN MX 10 world-walker.jp.

Name servers:
world-walker.jp.	30 IN NS ns2.value-domain.com.
world-walker.jp.	30 IN NS ns1.value-domain.com.