$ORIGIN .
$TTL 3600	; 1 hour
200.199.10.in-addr.arpa	IN SOA	gateway.mydomain.com. (
				1000       ; serial
				14400      ; refresh (4 hours)
				3600       ; retry (1 hour)
				604800     ; expire (1 week)
				300        ; minimum (5 minutes)
				)
			NS	gateway.mydomain.com.
$ORIGIN 200.199.10.in-addr.arpa.
1			PTR	gateway.mydomain.com.