Bind creates the “empty zones” by default. So, that is why the reverse DNS (the query type PTR) lookup does not work for a local addresses IP.
Define “empty-zones-enable no;” in named.conf this will work as you expect.
Also you can created reverse map zone for your local machines, for example:
zone "16.172.in-addr.arpa" IN {
type forward;
forwarders {172.16.53.50; 172.16.53.51; 172.16.53.52;};
forward only;
};