/var/named/db/rev.10.30.2

$TTL 3600	; 1 hour
2.30.10.IN-ADDR.ARPA.		IN SOA	ns.core2.co.uk. root.core2.co.uk. (
				2011051001 ; serial
				86400      ; refresh (1 day)
				7200       ; retry (2 hours)
				2419200    ; expire (4 weeks)
				3600       ; minimum (1 hour)
				)
			NS	ns.core2.co.uk.
$ORIGIN 2.30.10.in-addr.arpa.
1	PTR	vm106.public.core2.co.uk.
2	PTR	vm103.public.core2.co.uk.
253	PTR	juniper2.public.core2.co.uk.