REVERSE DNS Practices.

Frank Bulk frnkblk at
Sat Mar 21 17:44:15 UTC 2009

The recommendations in this draft proposal have worked for me:


-----Original Message-----
From: bruce at [mailto:bruce at] 
Sent: Saturday, March 21, 2009 5:39 AM
To: John Levine
Cc: nanog at
Subject: Re: REVERSE DNS Practices.

Slighty related...

Can people please post their recommended reverse dns naming conventions for a small ISP with growth and scalability in mind.
I already have one drawn up, but I would like to contrast and compare :D


On 21 Mar 2009 10:32:30 -0000, John Levine <johnl at> wrote:
>> I want to ask some folks out there that maintain reverse DNS queries
>>of their respective IP blocks. I want to know if there is a need for
>>me to contact my upstream provider. I am in charge of 2 /24's under
>>LACNIC. I've already registered my DNS servers on LACNIC. but for some
>>weird reason it's not owning reverse resolves. any tips would be
>>gladly appreciated.
> The RIRs don't maintain rDNS for you.  You'll have to trace the
> delegations downward from, find out who's handling your
> /24's, and contact them to get them to delegate your chunks to you.
> R's,
> John

More information about the NANOG mailing list