Anyone from AT&T DNS?

Christopher Morrow morrowc.lists at
Thu Oct 5 02:53:55 CST 2017

On Wed, Oct 4, 2017 at 10:43 PM, Matt Peterman <mpeterman at> wrote:

> The PTR record CNAMEs for my /25 allocated prefix are all messed up. They
> are returning as
> $ dig +short CNAME
> 128.128/
> Which is obviously a completely invalid DNS entry. I have opened a ticket
> through the web portal for “prov-dns” but Haven’t gotten a response for 7
> days.
> If anyone from AT&T DNS or knows anyone from AT&T DNS that can help it
> would be appreciated!
isn't this one of the proper forms of reverse delegation in CIDR land?


describes, or in a (perhaps more wordy fashion) in RFC2317?

I think it may be the case that the NS hosts are not prepared for such a
domain/record mapping though... the nameservers that would need to to be
authoritative for a zone like:


and have a bunch of PTR records like:

128             IN PTR
129             IN PTR


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