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Caller ID as a Reply-To header is a really good way to think about it. It's worth noting that there is a more reliable piece of data for actually identifying c
by tjohns 12y ago
Caller ID as a Reply-To header is a really good way to think about it.
It's worth noting that there is a more reliable piece of data for actually identifying callers: the ANI field. It doesn't show up on caller ID, but if you run your own PBX you might be able to log it. Its used for billing purposes, so it's much harder to spoof.
If you own your own PBX, you can modify Caller ID, but you can't modify ANI.
More info: http://en.m.wikipedia.org/wiki/Automatic_number_identification http://en.m.wikipedia.org/wiki/Automatic_number_identificati...
- Scoundreller 12y agoSo if I make a call with an outgoing VoIP service and set my caller-id to a particular number, what gets sent as the ANI? The scammers are definitely using a VoIP service around here anyway... Though my understanding is that ANI isn't blockable by the caller. So if you have a toll-free number, you can see the calling number for callers that have blocked their caller id.
- cxseven 12y agoMost Asterisk VOIP services easily allowed setting the ANI last I checked.