in-addr.arpa zone for subclass 'c' network

[Gerald Waugh]

My netblock of address are 216.175.178.32/28
My isp has delegated reverse for the netblock using CNAME records

@ IN SOA ns1.dsl.net. hostmaster.dsl.net. (
                        2000082300
                        7200 3600 604800 86400)
        IN      NS      ns1.dsl.net.
        IN      NS      ns2.dsl.net.
;
32-28   IN      NS      fsn1.frontstreetnetworks.net.
32-28   IN      NS      fsn2.frontstreetnetworks.com.
;
32      IN      CNAME   32.32-28
;33,34,35,36,37,38,39,40,41,42,43,44,45,46 are all CNAME
47      IN      CNAME   47.32-28

My 32-28.178.175.216 zone file is as below;
I am not sure of the entries to be made for;
32 which is the Network
33 which is a sDSL Gateway
47 which is the Broadcast Address
And what do I enter for IP addresses that I am not currently using;
34 - 39 and 42 - 44

My 32-28.178.175.216.in-addr.arpa zone file is;
@ IN SOA fsn1.frontstreetnetworks.net. root.fsn1.frontstreetnetworks.net. (
200008
2320 10800 3600 604800 86400 )
 IN NS fsn1.frontstreetnetworks.net.
40      in      ptr     frontstreetnetworks.org.
41      in      ptr     frontstreetnetworks.net.
41      in      ptr     fsn1.frontstreetnetworks.net.
45      in      ptr     fsn3.frontstreetnetworks.com.
46      in      ptr     fsn2.frontstreetnetworks.com.
46      in      ptr     frontstreetnetworks.com.