Classless PTR query issue

[Michael Varre]

On Tuesday, May 7, 2013 12:04:10 PM UTC-4, Justin T Pryzby wrote:
> I recommend "dig +trace -x" on one of your assigned IPs.  Compare with
> 
> the result from a known-good sub-24 rev dns delegation.  The ISP
> 
> should be returning something like:
> 
> 
> 
> 162.48.168.205.in-addr.arpa. 43200 IN   CNAME   162.160-175.48.168.205.in-addr.arpa.
> 
> 160-175.48.168.205.in-addr.arpa. 43200 IN NS    ns.norchemlab.com.
> 
> 160-175.48.168.205.in-addr.arpa. 43200 IN NS    ns1.norchemlab.com.
> 
> 
> 
> and your NS should respond for the 160-175 zone.  The particular
> 
> naming convention doesn't matter, but has to be consistent between you
> 
> and your ISP.  The filename of the zone doesn't need to match the zone
> 
> name, although that seems to be a popular misconception..  Slashes (as
> 
> in 160/28.48.168.205.in-addr.arpa) are mildly inconvenient convention
> 
> since, if the filename and zone DO match, they imply use of a
> 
> subdirectory.
> 
> 
> 
> Good luck,
> 
> Justin


Thanks Justin, I've been testing with dig and that's how I got the failed results posted previously. My digs lead me to believe their zones are named the same as mine, with -'s instead of /'s. 

dig -x 1.1.1.90 +trace
----snipped----
;; Received 180 bytes from 199.253.183.183#53(b.in-addr-servers.arpa) in 89 ms

1.1.1.in-addr.arpa. 86400  IN      NS      NS1.myisp.COM.
1.1.1.in-addr.arpa. 86400  IN      NS      NS2.myisp.COM.
;; Received 89 bytes from 199.180.180.63#53(r.arin.net) in 55 ms

90.1.1.1.in-addr.arpa. 3600 IN     NS      dns1.myns.com.
;; Received 75 bytes from 13.13.13.13#53(NS1.myisp.COM) in 84 ms

;; Received 44 bytes from 1.1.1.90#53(dns1.myns.com) in 80 ms
<end>


I've requested they confirm their setup, but I don't know how forthcoming they'll be.