[asterisk-users] How to detect fake CallerID? (8xx?)

Adam Goldberg adam at agp-llc.com
Wed May 10 10:28:31 CDT 2017

It's approximately impossible with current infrastructure.


Adam Goldberg

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Doug Lytle
Sent: Wednesday, May 10, 2017 11:24 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion <asterisk-users at lists.digium.com>
Subject: Re: [asterisk-users] How to detect fake CallerID? (8xx?)

>>> I ask my SIP provider to include more headers to show the real ANI? 
>>> What would that service be called?

If it's anything like a PRI provider, I've been told they only way to get true CID, in those instances, would be to provide a 1-800 number (US) for them to call. Then you'd get correct CID, since you're paying for both legs of the call.

I do not know if this holds true for a SIP provider,


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