$ORIGIN .
$TTL 604800	; 1 week
0.16.172.in-addr.arpa	IN SOA	dns1.monlabo.lan. root.monlabo.lan. (
				2          ; serial
				604800     ; refresh (1 week)
				86400      ; retry (1 day)
				2419200    ; expire (4 weeks)
				604800     ; minimum (1 week)
				)
			NS	srv-dns2.monlabo.lan.
			NS	srv-service.monlabo.lan.
			A	172.16.0.1
$ORIGIN 0.16.172.in-addr.arpa.
1			PTR	srv-service.monlabo.lan
2			PTR	srv-dns2.monlabo.lan
254			PTR	srv-admin-jp.monlabo.lan
srv-dns2		A	172.16.0.2
srv-service		A	172.16.0.1