caller id spoof application

[jason25]

Originally Posted by nmazloum

I dougt that there is an application that can do that, but i know of calling card which you can buy that are really nice to prank people with, i used it before on my friends and it works nicely, its called spoofcard (look it up on google), the nice thing about it is that you get to pick the number that shows on your friends caller id, it also has a voice changing feature....lol.

I heard of something like this, don't recall it being a calling card though.

try this, I guess you get 3 free
http://www.telespoof.com/freecall.php

edit:
found this too on another forum I frequent:

orginally posted by BIGJOE on lowandloud

Well I better get major props for this. The trick is, you can call anyone and make any number show up on the caller ID. With this you can prank people, scare people, or just simply **** with there heads like making it look lik the person is calling themselves. Or even that the devil is calling them. Heres the steps.

1) Call 1407 386 3737
2) As soon as it connects, press 5 and then dial the number u want to call and ignore what the operator is saying.
3) Then you press * and enter the number u want it to say but it has to be in this formant , 1*** *** **** like a real number
4) After you entered the number u want to show up, press pound and wait a few seconds. It will say You Just Hacked The Gibson
5) There will be no noise. You wont hear any rings but when someone picks up youll hear it and be able to talk to them.