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From: "Jay E. Morris" <morrisj@epsilon3.comcon>
Newsgroups: rec.arts.sf.written
Subject: Re: ongoing infrastructure changes with AI in the USA
Date: Wed, 20 Nov 2024 17:25:26 -0600
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On 11/19/2024 9:05 PM, Ted Nolan <tednolan> wrote:
> In article <vhji7h$24o52$1@dont-email.me>,
> Cryptoengineer  <petertrei@gmail.com> wrote:
>> On 11/19/2024 6:01 PM, Jay E. Morris wrote:
>>> 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.
>>
>> Interesting, thanks!
>>
>> pt
> 
> 	https://xkcd.com/1129/

I moved to Texas to Florida in 1996, the year before (partial) 
portability started.  Would have liked to keep my space coast number.