article
SHAKEN/STIR: Finally! A Solution to Caller ID Spoofing?
Fraud and abuse in the form of robocalling, and more specifically illegally spoofed calling, is the No. 1 consumer complaint to the Federal Communications Commission (FCC). Robocalls make up nearly half of all phone calls, so frustrated consumers simply don't answer incoming calls and businesses can't get through to customers when they need to reach them.
At the root of the problem is the ease of spoofing caller IDs. Anyone can spoof their outbound Caller ID by using an online service like Spooftel or SpoofCard. These services are meant to protect the caller's number from being displayed and claim they aren't intended for malicious purposes, but the fact that they exist indicates the breadth of the problem.
Read more here.