<div dir="ltr">I've been seeing something similar targeted at a healthcare client over the last few months.<div>Same exact situation where patients are calling some random number that isn't in our systems, but it gets forwarded to our systems for a few minutes/hours.</div><div>Because this particular client has 30+ locations, we started noticing it when calls were being misrouted to other locations. (i.e. patient calling Houston office gets routed incorrectly to the San Francisco office)</div><div>We initially suspected a 3rd-party marketing service that was issuing semi-temporary numbers to use in Facebook ad campaigns, but a decent amount of numbers didn't line up.</div><div>I also arrived at the possibility of this being used to monitor the calls for credit cards, social security numbers, or other private information.</div><div>I'm still gathering data from end-users to try and track it down.<br></div><div><br></div><div>-A</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Nov 11, 2021 at 8:13 AM LICT VoiceOps via VoiceOps <<a href="mailto:voiceops@voiceops.org">voiceops@voiceops.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">One of our clients is a small private school.<div><br></div><div>For the past month, the school has been getting calls meant for other schools in the general area (within 20 miles or so)</div><div><br></div><div>We have been able to get limited information from the caller like what number did they dial. They are definitely not dialing our client's DIDs.</div><div><br></div><div>It seems that they are dialing a number that they found on an internet search, and the call is then forwarded to one of the DIDs at the school.</div><div><br></div><div>We are seeing matching CDR records for our PBX and our carrier's CDR billing reports, so it does not look like a SIP hack.</div><div><br></div><div>It seems that the number is forwarded for just a few minutes to our school, then goes dead, or rings busy, no longer forwarded to our client.</div><div><br></div><div>The pattern here is that the caller obtained the number from an internet search of a school in the area. These are real people calling, as we have been able to call them back and verify. The callers who reached our client are as bewildered as we are.</div><div><br></div><div>I am sure this is some sort of scam -- but I can't figure out what it is. Are the scammers recording the lines and seeing if they hear financial information? Seems like a longshot, but that is the only thing I can think of.</div><div><br></div><div>I know there is little that can be done to prevent a call being forwarded to you upstream of the carrier, but would love to hear anyone's thoughts about this.</div><div><br></div><div><br></div><div><br></div><div><br></div></div>
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