Re: ongoing infrastructure changes with AI in the USA

On 11/19/2024 12:44 PM, Garrett Wollman wrote:

In article <vhih8r$1uic7$1@dont-email.me>,
Cryptoengineer  <petertrei@gmail.com> wrote:

On 11/19/2024 11:25 AM, Paul S Person wrote:

I don't suppose there is an easy way to relate a given cell phone
number to the carrier and so to the @ address?

>
No, there isn't. US phone numbers have been movable between carriers
for decades. I did it myself.

>
There is a national database -- obviously, because the incoming calls
have to get routed to the right carrier.  I seem to have misplaced the
name of this database; it's operated under an FCC contract by an
organization called the Number Portability Administration Center.
Every phone call and SMS message requires a lookup in this database.
>
Originally, calls would be routed on the basis of the local exchange
carrier to which the NPA-NXX was assigned, and then numbers which had
been "ported out" would be kicked back to the originating carrier with
a "not our number" message to force a database lookup.  These days,
it makes sense to just do the database dip unconditionally.  (There's
caching in the carrier networks to minimize their database access
charges.)
>
Whether there's any way for normal people to get access to this
information I don't know.
>
-GAWollman
>

 As I said in the other message, https://www.whitepages.com/ and the reverse number lookup did give my carrier. I have not moved carriers in over 20 years though so someone who has would have to verify that it still gives the right carrier.