[GRLUG] $50K Prize if You Find Way to Block Robocalls

[Michael Mol]

On Wed, Nov 7, 2012 at 10:51 AM, Adam Tauno Williams
<awilliam at whitemice.org> wrote:
> On Wed, 2012-11-07 at 10:43 -0500, Tim Schmidt wrote:
>> DNSBLs sound like a good model to emulate.  The only question I have
>> is how hard is it to acquire use of a different native phone network
>> address to bypass the DNSBL?
>
> Absolutely trivial.  Blocking or faking caller-id information is both
> *EASY* and even faking is pretty-much legal.  If you are a third-party
> integrator [not the telco] that is all the information you are going to
> have access to, and its junk.

I expect one would *become* a telco; access to the circuit ID is
pretty much mandatory for a system like this to work.

Curiously, for a while, T-Mobile had me on a trial service which gave
me the "real" source phone numbers for phone calls. It was actually
pretty confusing, though; calls from Arizona would look like they came
from Georgia. Calls from California looked like they came from New
York.

Apparently some telcos are willing to deal in the necessary data.

--
:wq