$ORIGIN .
$TTL 86400	; 1 day
3.168.192.in-addr.arpa	IN SOA	ns1.ventura.c. root.ns1.ventura.c. (
				1          ; serial (auto-updated)
				10800      ; refresh (3 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)
			NS	ns1.ventura.c.
			NS	ns2.yourisp.com.
$ORIGIN 3.168.192.in-addr.arpa.
$TTL 259200	; 3 days
1			PTR	ns1.ventura.c.
			PTR	www.ventura.c.
			PTR	mail.ventura.c.
			PTR	gateway.ventura.c.
$TTL 600 ; 10 minutes