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How to reveal blocked caller ID info: a video guide to risky behavior

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Let's say for some reason someone has his or her caller ID blocked and is calling you all the time. Let's then say you really want to know who that person is for, you know, whatever reason -- not that we'd know anything about that. Some crafty phreaker types have come up with a way to do this using an enterprise-spec asterisk box and a SIP trunk provider. In a demonstration video, a hacker tweaks said asterisk box with some new configurations to strip out privacy flags, forward the call to another number, and ultimately reveal caller ID information which, surprisingly, is still available. This isn't meant to be easy, but if the terms "prepend," "SIP trunk," and "asterisk box" don't scare you away, go ahead and watch the video after the break. Big disclaimer: we're not responsible for your broken gear, jail time, or restraining orders.



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