Siti che permettono di falsificare l’identificativo del chiamante (Caller ID)

BBC NEWS | Technology | Fake call ID services on the rise: "

...Many online services are springing up that bypass Caller-ID and can make it look like you are ringing from almost any phone number. The spoofing services work with mobile phones, landlines as well as telephone services that are routed via the net. Though spoofing Caller-ID is not illegal there are already reports that conmen are using it to give bogus calls more credibility...

At least seven firms have set up shop on the net offering these spoofing services. Four are aimed at consumers and another three restrict themselves to helping law enforcement agencies and private investigators.

...Using the faking systems typically involves ringing a freephone number then tapping in the number you want your call to look like it is coming from and who you want to call. Some make users fill in a web form for the number they want to call and spoof."