reverse dns works but kinda doesnt (sub class c)

[Michael Voight]

Aj wrote:
> 
> I have configured my ns as a primary for my 64 block of ip space, and i
> have told my isp to make mine an authority for those 64 blocks.
> 
> so they did add all 64 cnames aliases to my nameserver. when i do
> nslookup
> ip address.. i do get the results back that i want but the thing is when
> i go on IRC etc., with one of the hosts.. it doesnt reverse.. when you
> do whois on it.. only the ip is showing.
> 
> is this a problem in my configuratin or my isp's side? here is one of
> the
> ip address if you want to know more info, 209.157.120.36.
> 
> thanks for your help.

It sounds like your 64 address part of the zone isn't delegated to you.
This is possibly because the ISP didn't want to go thought the RFC 2317
kludge. (Step 1, create a CNAME record for all of the PTR records)

Michael