Confused about reverse zone (RFC 2317?)

[Jack Baty]

We have been asked to manage the reverse zone for 12.31.231. This is the 
only "third party" reverse zone that I've had to deal with and I'm 
having a heck of a time getting my head around it.

Forgive any silly questions, but I've read RFC 2317 and the appropriate 
section of DNS and BIND and still don't quite get it.

Reverse of 12.31.231.132 gets me...

132.231.31.12.in-addr.arpa. 81830 IN    CNAME 
132.128/25.231.31.12.in-addr.arpa.

I cannot seem to figure out the appropriate way to handle this. Here's 
what I have...

zone "231.31.12.in-addr.arpa." IN {
         type master;
         file "hosts/masters/231.31.12.in-addr.arpa-hosts";
         allow-query { any; };
};


And in 231.31.12.in-addr.arpa-hosts....

$TTL 86400
@  86400  IN  SOA  shaggy.fusionary.com. hostmaster.fusionary.com. (
                                	2004050501
				28800
				7200
				604800
				86400)

@               IN      NS      shaggy.fusionary.com.

140             IN      PTR     webmail.hendrickson-intl.com.
132             IN      PTR     mail.hendrickson-intl.com.

If I need to specify the zone different than "231.31.12.in-addr.arpa.", 
how do I do that? I've tried "132.128/25.231.31.12.in-addr.arpa." and 
"132.231.31.12.in-addr.arpa." with no luck but now I feel like I'm 
guessing and in my case that's *always* a bad idea.

Any suggestions or pointers would be most welcome.


-- 
Jack Baty
Fusionary Media - http://fusionary.com/
Weblog - http://jackbaty.com