Reverse DNS Dig returning PTR results only with trace option

Chris Hills chaz at
Tue Nov 10 21:12:38 UTC 2009

On 10/11/09 18:25, Raj Adhikari wrote:
> Now I can do a dig for an hour or so. But again I run into same problem.
> It wont return PTR record unless I explicitly do dig on
> Also, the last did showing as Authority NS for this IP.
> But trace showing as final sender.
> Could someone shed a light on this?    86400   IN      NS      NS3.MCLEODUSA.NET.    86400   IN      NS      NS1.MCLEODUSA.NET.    86400   IN      NS      NS2.MCLEODUSA.NET.
;; Received 112 bytes from in 173 ms 7200 IN    NS 7200 IN    NS
;; Received 90 bytes from in 159 ms 3600 IN    NS 3600 IN    NS
;; Received 160 bytes from in 167 ms

You should not chain a delegation in this manner. Either make the 
servers and authoritative for or have your ISP change the NS records to 
point directly to and The cyzap servers do not respond with the 
authority bit set ("aa" in dig).



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