DNS resolver addresses for Sprint PCS/3G/4G

Robert Drake rdrake at direcpath.com
Tue Jan 22 14:47:56 UTC 2013

On 1/16/2013 7:13 PM, Jay Ashworth wrote:
> I've noticed, for quite some time, that there seems to be a specific category
> of slow that I see in using apps on my HTC Supersonic/Sprint EVO, on both
> their 3G and 4G networks, and I wonder if it isn't because the defined
> resolvers are and, which aren't *on* Sprint's networks.
> Does anyone have, in their magic bag of tricks, IP addresses for resolvers
> that *are* native to that network, that they wouldn't mind whispering in my
> ear?
Not directly PCS, but ns[1-3].sprintlink.net are used for their 
recursive DNS for customers.  They're anycasted so you should be able to 
just use the first IP (  I don't know what these are 
because I haven't been a customer for years, but it appears they may 
have servers specific to PCS as well:

PING ns1.sprintpcs.net ( 56(84) bytes of data.
rdrake at terminal:~$ host ns2.sprintpcs.net
ns2.sprintpcs.net has address
rdrake at terminal:~$ host ns3.sprintpcs.net
ns3.sprintpcs.net has address

well, at least one server.

Except: traces through to an XO customer in California:

Castle Access Inc ARIN-CASTLE-ALLOC (NET-69-43-128-0-1) -

Perhaps they do some "special" things on the PCS side to make this DNS 
server work.

I would use

> Offlist is fine.  Yes, I owe the list summaries on a couple earlier
> questions; I still have the details to write from.  :-}
> Cheers,
> -- jra

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