RE: AT&T Uverse/DSL Network Engineer DNS question

[Tim Haak <thaitim43 () hotmail com>]

Thanks for checking guys. I checked RIR registration and they have those 2 IPs registered in 
Texas. I have read that AT&T uses anycast for name resolution for 
Uverse/DSL customers. I can only check from my account in Florida and 
the DNS query responses so far resolve as if I were in the Central 
United States because the recursive resolvers are registered in Texas, I
 as far as I can tell. 

I just need to know if these are the only DNS server IPs they hand out to their Uverse/DSL customers.

Thanks,
Tim Haak

> From: wbailey () satelliteintelligencegroup com
> To: jof () thejof com; tim.haak () hotmail com
> Subject: Re: AT&T Uverse/DSL Network Engineer DNS question
> Date: Tue, 5 Feb 2013 21:15:46 +0000
> CC: nanog () nanog org
>
> Here in Orange County, CA I've got a /28 with Uverse Residential with the
> same DNS servers as mentioned below.
>
> FYI 
>
> On 2/5/13 1:10 PM, "Jonathan Lassoff" <jof () thejof com> wrote:
>
> > These appear to be an anycasted service, as I reach different destinations
> > based on my source address.
> >
> > Hopefully each deployment has unique origin IPs for their recursive
> > queries.
> >
> > I would recommend against looking at RIR registration data to determine IP
> > location. There's often little to no correlation, there.
> >
> > --j
> >
> > On Tue, Feb 5, 2013 at 1:01 PM, Tim Haak <thaitim43 () hotmail com> wrote:
> >
> > > Hi,
> > >
> > >
> > >
> > >
> > > Can a AT&T Uverse/DSL Network Engineer answer a question about the DNS
> > > server IPs that are handed out to customers please? I am currently
> > > testing
> > > from
> > > a Florida IP. Can you please let me know if all Uverse and DSL customers
> > > across the United States only use these 2 IPs as their primary and
> > > secondary
> > > DNS servers?
> > >
> > >
> > >
> > > 68.94.156.1
> > >
> > > 68.94.157.1
> > >
> > >
> > >
> > > We
> > > provide services based on IP GEO-location. Since the 2 recursive
> > > resolvers
> > > below are registered in Texas every DNS query for any of our records
> > > return
> > > results that are intended for IPs in that region. In other words, users
> > > on
> > > the
> > > east coast would actually resolve to a central part of the US or west
> > > coast IP.
> > >
> > >
> > >
> > > Thanks
> > > in advance,Tim