how DNS client perform reverse lookup

Keith Ng ngkeith at
Tue Jan 25 15:44:27 UTC 2005

Barry Margolin wrote:
> In article <ct3ioj$1qll$1 at>, Keith Ng <ngkeith at> 
> wrote:
>>Would someone tell me how DNS client perform reverse lookup? Is there 
>>any root servers like forwards lookup for the in-addr.apra domain?
> They start from the normal root servers.  These servers have delegation 
> records for, just like they do for com, net, etc.  The 
> client servers follow this reverse delegation in exactly the same way 
> that they follow forward delegations.  As far as the nameservers are 
> concerned, there's no difference between forward and reverse DNS; 
> everything is just arbitrary labels to the servers and resolvers.
Thanks guys,

I did not realize that the root servers for TLD are also responsible for 
the domain.

Now it is making sense to me.

Thanks again


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