[asterisk-users] A method to determine PSTN Call Provider?

[Barton Fisher]

----- Original Message ----- 
From: "Gordon Henderson" <gordon+asterisk at drogon.net>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
Sent: Sunday, December 21, 2008 11:30 AM
Subject: Re: [asterisk-users] A method to determine PSTN Call Provider?


> On Sun, 21 Dec 2008, Barton Fisher wrote:
>
>> I'm looking for a solution to determine if a PSTN call to a zaptel 
>> channel was originated from a VoIP provider or not in real time.
>> I'd like to use the callerid(num) to reverse match to the provider.
>> Does anyone have a clue how I could do this?
>
> What country are you in/want to tell?
>
> In the UK it's realtively easy, but it's a big database, and it won't tell
> you anything about ported numbers eg. from a PSTN to VoIP operator)
>
> That's assuming the caller doesn't withold...
>
> Gordon

Sorry, I'm in the US

Bart