Reverse lookup for classless networks

[Mark Andrews]

Because it requires the parent zone with the CNAME records to also be set up which maps the well known query names to the alternate names. 


-- 
Mark Andrews

> On 27 Dec 2018, at 21:01, Nagesh Thati <tcpnagesh at gmail.com> wrote:
> 
> Hello,
> I have been trying to make the reverse zones for the classless networks. I was able to create such zones by following an online guide. The guide says to create a reverse zone for a classless network as following,
> Network: 28.0.0.0/27
> Reverse Zone: 0-27.128.0.0.28.in-addr.arpa.
> Example PTR record: 130.0-27.128.0.0.28.in-addr.arpa. PTR test.example.com.
> 
> Now the zone is up, but I have problem in looking up the IP address using the below method,
> dig @localhost -x 28.0.0.130
> 
> While the above lookup is not working, the below method is working,
> > dig @localhost 130.0-27.128.0.0.28.in-addr.arpa. PTR +short
> > 3G00002Phone.adparent.com.
> 
> Now can someone tell me why the first method is not working, will my reverse zone work properly in the real world?
> 
> Thanks for your help.
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