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Handling Caller ID Spoofing? 556

An anonymous reader writes "A nice little old lady I know has had her number spoofed by some car warranty scammers. They're calling hundreds of potential victims per day pretending to use her phone number, and the angry ones call her back; some of them have even left death threats. She's terrified. Some well-intending anti-telemarketing folks have posted her address on the 'net as well. How can we figure out where these scammer bastards are, and what's the state of the current legislation to prevent caller ID spoofing? I called the FBI in Boston (near where she lives) and they said they can't help. She's called her phone company, but they said they can't help either. She's had the same number for over 50 years and doesn't want to change it." If the Feds can't or won't handle it, what's the best approach here?
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Handling Caller ID Spoofing?

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  • Ouch (Score:5, Insightful)

    by Aphoxema ( 1088507 ) * on Tuesday October 21, 2008 @12:13PM (#25454965) Journal

    Well good grief, the two exact entities who are supposed to take care of this kind of thing refuse, then just what is going on in this country?

    I'd just call them both a few more times to see if there's anywhere to get, it's very clear laws have been broken.

    • Re: (Score:3, Insightful)

      by pla ( 258480 )
      Well good grief, the two exact entities who are supposed to take care of this kind of thing refuse, then just what is going on in this country?

      "Business as usual".

      Extended warranty telemarketers, scum of the Earth or not, help keep the economy flowing; little old ladies do not. Extended warranty telemarketers pay HUGE monthly phone bills; little old ladies do not.

      The phone company cares about one thing only - Making as much money any way they can. Dealing with complaints from small potatoes takes m
      • Re:Ouch (Score:4, Interesting)

        by JCSoRocks ( 1142053 ) on Tuesday October 21, 2008 @01:10PM (#25455937)
        You could fix the "who cares" part by forwarding calls to her number to the FBI or your local phone company.
        • Re:Ouch (Score:5, Interesting)

          by mosinu ( 987941 ) on Tuesday October 21, 2008 @01:39PM (#25456409)

          You could fix the "who cares" part by forwarding calls to her number to the FBI or your local phone company.

          Careful with that... I got my hand slapped by the FBI once because they wouldn't do anything so I redirected all the traffic I was complaining about to them. Took them 2 weeks but they had me hauled before a Federal Judge to tell me to stop. The judge vacated the charges on my promise to stop redirecting traffic.

          • Re:Ouch (Score:5, Funny)

            by Just Some Guy ( 3352 ) <kirk+slashdot@strauser.com> on Tuesday October 21, 2008 @02:13PM (#25456953) Homepage Journal

            I skipped the middleman and now answer "PRIVATE NUMBER" and obviously-forged numbers a little differently. Example:

            Me: Nebraska Attorney General John Bruning's office, how may I help you?
            Scammer: Ummm, would you... like to cut your credit card interest rates?
            Me: If you hang up, I will arrest you. What number are you calling from?
            Scammed: [scared expletive deleted] [dial tone]

            OK, so I lied. I don't think they're going to file a complaint about it.

    • Re:Ouch (Score:5, Informative)

      by JTorres176 ( 842422 ) on Tuesday October 21, 2008 @12:53PM (#25455661) Homepage

      I've worked accounts receivable before. If you call a company and don't like the answer you get, be polite, say thank you, then hang up. Call back immediately and 9 times out of 10, you get a different person. It's called "shopping", and people do it with doctors, salesmen, and even government offices. Call back until you get the answer you want or someone who's willing to help.

    • Re:Ouch (Score:5, Informative)

      by IP_Troll ( 1097511 ) on Tuesday October 21, 2008 @02:16PM (#25456989)
      Wrong, neither of those entities are supposed to take care of this king of thing.

      The correct agencies are the FCC and the FTC.

      Here is an article about Caller ID fraud that gives the contact name and number for the FTC investigator in charge of this kind of thing.
      http://www.ftc.gov/opa/2006/05/scorpio.shtm [ftc.gov]

      It is from 2006, so the hierarchy may have changed, but it will send you to the right office. It the number doesn't work call - 1-877-FTC-HELP
  • News Media (Score:5, Insightful)

    by topham ( 32406 ) on Tuesday October 21, 2008 @12:14PM (#25454973) Homepage

    Bring the news media in on it, somebody a little more mainstream than Slashdot.

    Then start making threats, and if the phonecalls are inter-state commerce it is a federal issue. Back them up against a wall and force them to act.

    • Re:News Media (Score:5, Insightful)

      by Lemmy Caution ( 8378 ) on Tuesday October 21, 2008 @12:16PM (#25455011) Homepage

      Contacting the media is definitely the best strategy: not only is this newsworthy, it should shame several agencies into action.

      • Re:News Media (Score:5, Insightful)

        by BrokenHalo ( 565198 ) on Tuesday October 21, 2008 @12:34PM (#25455329)
        Contacting the media is definitely the best strategy: not only is this newsworthy, it should shame several agencies into action.

        Even better if you turn up in person at the agencies and stick to your guns enough to get the complaint referred to some sort of managerial level, then make sure you get the name of the person you spoke to.

        If you quote this person by name in your report to the media, it sends a clear signal that someone is going to need to cover his ass. At that point, the excreta should make contact with the impeller.
    • Re: (Score:3, Insightful)

      by evanbd ( 210358 )
      You won't get national coverage, but you don't need it either. This is easily worthy of a few minute segment on the local news -- which ought to be sufficient to shame somebody into taking you more seriously. The phone company rep really won't want to go on camera saying "sorry, they're abusing the phone system, and we won't help."
    • Re:News Media (Score:4, Informative)

      by Attila Dimedici ( 1036002 ) on Tuesday October 21, 2008 @12:34PM (#25455341)
      The idea of contacting the news media is a good idea. But first she should contact the person who represents her district in the U.S. Congress and the person who represents her district in the State legislature. Many times these individuals are happy to go to bat for someone like this little old lady. There is a federal law against spoofing caller id.
  • Election Time (Score:5, Informative)

    by jaredmauch ( 633928 ) <jared@puck.nether.net> on Tuesday October 21, 2008 @12:14PM (#25454981) Homepage

    Call local elected reps (state & federal) saying that you're unable to get anyone to deal with the issue. Call the FBI in DC as well. If she's getting interstate death threats, that's illegal and the FBI can call the people back. I've had good luck with my local FBI office (Ann Arbor) when I received an interstate death threat.

  • Bogus. (Score:5, Insightful)

    by Anonymous Coward on Tuesday October 21, 2008 @12:17PM (#25455035)

    The call can quite easily be traced back to where it came from -- even if it's voip in nature, at very least you can find the originating carrier and they can deal with their customer.

    We run a very popular VoIP service (http://ironvoice.com) and tightly control caller id in a manner that still gives our customers flexibility but still imposes responsibility.

    The FBI can certainly help, that's bogus. The phone company can certainly help, that's bogus as well. The phone company knows from which carrier the call came from and so on and so forth until they can pin down the offending carrier.

    Legislation isn't the answer -- customer service is.

  • Call the FCC? (Score:5, Informative)

    by urbanriot ( 924981 ) on Tuesday October 21, 2008 @12:18PM (#25455055)
    In Canada, we have a governing body similar to your FCC called the CRTC. Whenever we have such problems we can contact them and they'll conduct an investigation. So far I've put an end to three instances of harassing telemarketing / late night fax blitzing. I'd contact the FCC next, see what they have to say. Someone somewhere is in charge of moderating this...
    • The Federal Trade Commission may help, too, if it's a US company from another state.

    • Re: (Score:3, Informative)

      by TomTraynor ( 82129 )

      Doesn't work if the call comes from outside of Canada. I got those at times and the CRTC told me to take it up with the telcos. The telcos said it came out of country and they couldn't do a thing. I ended up going to the FTC and FCC and leaving a note there, but, nothing has happened so far.

  • whocalled.us (Score:4, Insightful)

    by Anonymous Coward on Tuesday October 21, 2008 @12:18PM (#25455065)

    You can use http://whocalled.us/ to coordinate investigation. Even though the number is spoofed, as long as they are using it consistently it is still an identifier. As everyone shares facts they discover it's possible to find the true identity.

    Caller ID spoofing has become a real problem, but political representatives are too busy flashing around fake solutions to hyperinflated problems, like throwing more money at stopping the 9000 pedo penises from raping children over the internets.

    If anyone has a technological solution, please post it, as we have more of a chance of fixing this stuff as engineers than the politicians do as legislators.

    • Phone companies should read the caller ID information from outbound calls from their customers and block the call if the caller ID doesn't match.

      The lady could setup a voice menu explaining that she isn't responsible for those calls, and press 1 if they want to ring through. That should eliminate some of the calls.

  • Wire Fraud (Score:5, Interesting)

    by Ice Tiger ( 10883 ) on Tuesday October 21, 2008 @12:18PM (#25455067)

    Doesn't this count as wire fraud?

    Mind you this practice will get attention when the numbers used are not those of citizens but those used by government lobbying corporations.

  • Easy to fix... (Score:3, Insightful)

    by Piranhaa ( 672441 ) on Tuesday October 21, 2008 @12:19PM (#25455073)

    I calle the FBI in Boston (near where she lives) and they said they can't help

    Just tell them people are getting bomb threats... That should easily get this put on their #1 list and resolved in about 5 minutes tops. Isn't that why they phone tap everyone?

  • Quick workarounds (Score:4, Interesting)

    by grub ( 11606 ) <slashdot@grub.net> on Tuesday October 21, 2008 @12:19PM (#25455075) Homepage Journal

    1) Have her set up an answering machine with a short explanation.
    2) Get the mainstream media involved.
  • by Reality Master 201 ( 578873 ) on Tuesday October 21, 2008 @12:20PM (#25455097) Journal

    Well intentioned or not, those guys are fucking assholes.

  • Same boat (Score:4, Funny)

    by Ollabelle ( 980205 ) on Tuesday October 21, 2008 @12:20PM (#25455105)
    I'm suffering through the same thing with scammers using my direct office line, although it's not as bad as this guy's mother - about 5-10 calls a week.

    About all I can do is have a nice conversation with the caller, explain the situation, and ask them to talk with the scammer next time and find out who they are. I volunteer that I have some employees in Afghanistan who, in exchange for a ticket home, will be happy to pay the bastards a visit.

  • State's Attorney (Score:3, Insightful)

    by exiguus ( 688898 ) * on Tuesday October 21, 2008 @12:22PM (#25455145)
    You can try contacting your state's attorney. They're normally pretty helpful ... because most are elected (at least in my state anyway).
  • by MosesJones ( 55544 ) on Tuesday October 21, 2008 @12:23PM (#25455151) Homepage

    Come on its 2008, we can't just take such trifling things as an individuals vouching for someone and their previous good record. She SAYS that she didn't make the call, but what would she say if she was waterboarded? Would she stick to her story or switch it to admit that she did make all the calls?

    Sure she claims that she doesn't want to change her number just because she has had it for 50 years, but couldn't that be because she co-ordinates a major terrorist cell of grandmas across america (known in intelligence circles as Al-Quilter)? These evil women are spreading hate through out of date sugary treats and a fondness for knowing everything that is going on in the world while comparing it unfavourably with their own personal ideology of "it was better when I was young". We must stop these pedallers of hate against modern American who condemn the US of A as going to hell in a hand cart and not the sort of country that they want to live in. Death to Al-Quilter

    I say condemn her based on the irrefutable caller ID evidence.

    Seriously though its good that this old dear has someone looking out for her because in modern America you could easily see her being prosecuted because of an unfortunate conjunction of evidence.

  • by damn_registrars ( 1103043 ) <damn.registrars@gmail.com> on Tuesday October 21, 2008 @12:24PM (#25455171) Homepage Journal
    I'm guessing based on my own experience with calls from various phone scammers that they left a 1-800 call back number, right?

    If thats the case, see if you can figure out who sold the 1-800 number. I have been dealing with annoying bogus credit counselors that won't stop calling and leaving their 1-800 numbers as callbacks. There are some good resources for this stuff online that may be able to help you find the company who sold the number - they are sold similarly to web domains, though without any obligation to anyone to release the data on who has it.
    • Re: (Score:3, Interesting)

      by molo ( 94384 )

      I got one of these calls. It was to my cell phone, from a caller ID of 414-302-xxxx. It was a robocall asking about renewing my "vehicle warranty", and that I should press 1 to talk to a rep. So I pressed 1 and asked the rep what vehicle warranty this was about (as I don't have any vehicle under warranty). She said that she couldn't tell me for security reasons (!!) and that it was usually a '95-'97 model year. I told her I had no such vehicle, and she said she would "remove me from their list." End o

  • Voicemail? (Score:5, Insightful)

    by MadHakish ( 675408 ) <madhakish@ g m a il.com> on Tuesday October 21, 2008 @12:26PM (#25455209)
    Why not, for the immediate future, setup her voicemail to answer after 1 ring, and set the voicemail message to something like "This phone number is being falsely used by a telemarketing company as their caller ID. Please call your local phone company and tell them you have received a telemarketing call using an hijacked caller ID entry.". If you can find out the actual company doing it, I'd throw their real phone number and company name in their too, just for good measure. At the very least, people will know not to leave a nice elderly lady death threats, and hopefully your phone company will take notice and track down the offending telemarketers and cut their "lines" off. I'd bet the voicemail volume drops significantly, legitimate ones get through and leave a message, and you'll probably hear a few less death threats against grandma.
    • Re:Voicemail? (Score:5, Insightful)

      by Insightfill ( 554828 ) on Tuesday October 21, 2008 @03:18PM (#25457945) Homepage

      Why not, for the immediate future, setup her voicemail to answer after 1 ring, and set the voicemail message to something like...

      Because: I've noticed that most people don't listen to the outgoing voicemail message. During the ringing and soon after the pickup, most people are mentally rehearsing their script in their head. "Hi, I'm calling to tell you..." I've created messages to the effect of "I'm not in the office, won't be back for a week, and won't be checking messages. Here's an alternate number for you to try..." and they STILL leave a message oblivious to what I've just told them, asking for immediate or short-term response.

  • by Anonymous Coward on Tuesday October 21, 2008 @12:28PM (#25455223)
    I'd call the FBI and the telephone company again. Be firm but polite when asking for help. Get names and phone numbers of everyone you talk to. If that person says no, ask for the next person up in the chain of command.

    Oftentimes, people just don't know how to ask for help correctly when contacting an agency such as the FBI or telephone company. If she can't clearly articulate the problem to the person on the other end of the phone they simply might not be aware of the issue or its ramifications.

    If you're able to clearly articulate the issue and still get denied, start writing letters. To the SAC of the local FBI office, or as high up as you can go to the telco. And as others suggested, contact the media: the local newspaper omsbudman, the local TV station's investigative reporter. And also as others have suggested contact your local elected representatives.

    I'm not defending the FBI or phone company, but I've seen instances where a problem simply isn't stated clearly enough for the other party to understand what's going on. So the first thing to do is ensure that when the FBI and telco are involved, that the problem is stated in correct terms (and that you're talking to the proper person in the organization).
  • by icepick72 ( 834363 ) on Tuesday October 21, 2008 @12:29PM (#25455247)
    She should start providing a car warranty if she wants to keep her phone number.
  • I know who they are (Score:5, Interesting)

    by Lookin4Trouble ( 1112649 ) on Tuesday October 21, 2008 @12:31PM (#25455277)
    I had these assclowns call the emergency services number at my work with their auto-dialer. That number rings to a ton of desks and is SUPPOSED to spread info about a medical emergency in the building. It took a good bit of google-fu to track them via their spoofed caller ID.

    You're looking for:

    Digitcom Services, Inc.
    12923 Venice Blvd, Los Angeles, CA 90066
    Phone (310) 358-7000
    TollFree(800) 464-5446
    Fax (310) 437-4105

    Please note: I am not posting this so you can pester, annoy, harass, or threaten them. If you call, call once, speak to their manager, and politely let them know what you think about their business practices. What you do with this is up to you, I hold no responsibilty for the actions of others.

    • Re: (Score:3, Interesting)

      by molo ( 94384 )

      Can I ask how you tracked them down? I'm not too familiar with CallerID spoofing, and I'd like to know about ways to detect and defeat it.

      Thanks
      -molo

      • Re: (Score:3, Interesting)

        A little google-fu, followed by a quick call to the FCC (amazing how responsive they are when an auto-dialer hits an emergency services number!) and an hour later, got a call back with the provider's number. Please note, though, that filing a complaint with the FCC and receiving this type of service is only available for a designated "Emergency Services" number (1 number out of the block of 1,000 that I manage). They check the facts of the case, so don't just call and complain every time you get an unsoli
    • by teridon ( 139550 ) on Tuesday October 21, 2008 @12:56PM (#25455717) Homepage

      Do you have proof that they are indeed the company responsible?

  • by LWATCDR ( 28044 ) on Tuesday October 21, 2008 @12:37PM (#25455369) Homepage Journal

    "She's terrified. Some well-intending anti-telemarketing folks have posted her address on the 'net as well. "
    Welcome to vigilante justice. I wonder how many folks on slashdot think that posting peoples address like this on the Internet is a good idea?
    Well I am sure that if it was a real scammer then it would be okay...
    Until you make a mistake.
    Call the police, then the news, then your elected reps...
    They need to hunt these idiots down.
    Both the scammers and the ones that are calling this lady.

  • by Surt ( 22457 ) on Tuesday October 21, 2008 @12:44PM (#25455487) Homepage Journal

    They love to make themselves look good with stuff like this. They'll get the FBI hopping. Caller ID spoofing is fraud, and it's prosecutable.

  • by hooshman ( 1390657 ) on Tuesday October 21, 2008 @12:47PM (#25455553)
    This probably won't help, since telemarketers probably wouldn't call VoIP DIDs, especially if they are doing sketchy stuff like this. However, if you're receiving their calls and happen to be using a SIP phone, this comment is for you. I don't know of how people would mask their caller ID on a normal land line. Of course people can get those caller ID spoof cards, but where are they calling when they call those numbers? Chances are, it's a VoIP service. If someone who has a SIP phone is called by these telemarketers, they may be able to retrieve their real caller ID. Unless the telemarketers really know what they're doing, they probably only changed the caller ID field in the SIP header, and didn't touch the P-Asserted-Identity field. Using asterisk, one can obtain the caller ID out of the P-Asserted-Identity field like this, before having the phone ring of course: exten => s,1,Set(passertedid=${SIP_HEADER(P-Asserted-Identity)}) exten => s,2,Set(CALLERID(all)=${CUT(passertedid,@,1):5})
  • little old ladies are always calling me

    no seriously. the best i can make out from the odd chats i've had with various little old ladies over the years is that my number was previously owned by a high end and antique pen dealership. that explains the demographics of the calls i get. an occasional little old man, sure, but mostly little old ladies make up the customer base for fine crafted pens

    • Re: (Score:3, Interesting)

      by Just Some Guy ( 3352 )

      I had to change phone numbers when switching from ISDN back to POTS way back when. The first number we got had been owned by a drug dealer, and we'd get collect calls from prison and people wanting a fix. That lasted for about a day. The next number we got had been the local Alcholics Anonymous chapter, and after a couple of bleary 2AM "if I don't quit drinking I think I might die" calls, we switched again. So far, so good.

  • by FewClues ( 724340 ) on Tuesday October 21, 2008 @01:05PM (#25455839)
    Since the spoofed calls are not coming to her number the records will only show the angry folks who are getting scammed. It is their phone records that will indicate the source. Purchase a call screening device ($60) and block calls from out of the area or any unrecognized number. Most machines allow you to use both a white list of good numbers a priority list of close friends and a rejection list that would include anyone else. We were getting a lot of drunks calling late at night waking us in a panic. We put a "caller ID with ring control" on the line and have not had a single unknown phone call. We have not had anyone we white listed blocked. So its a cheap answer to the problem.
  • by killmofasta ( 460565 ) on Tuesday October 21, 2008 @01:05PM (#25455857)

    Dosn't matter a bit FBI? CIA? RGB? TFB?

    If she was getting call backs, she should tell EVERY ONE WHO CALLS, AWS are scammers, and they should register with the FTC: and START Signed and dated PHONE LOGS. Every one I hear gets these phone calls, I show them the origional post card that started it all, and my phone log. I have clued in about 20 people, and we have filed over 15 reports for illegal telemarketing contact, i.e. Dont call EVER, and ... they ... call @ $500 per complaint.

    http://www.ftc.gov/ [ftc.gov]

    Scammer name:
    Automotive Warranty Solutions
    6501 congress ave, ste 140, boca raton, fl 33487
    877-700-5880,
    Call their 800 number, and ask to be put on their do not call list. ( just everone call plz )

    This is a Attorney General who is taking this problem seriously. ( Note: California and Florida are probibly NOT ):

    http://www.ct.gov/AG/cwp/view.asp?A=2795&Q=411422 [ct.gov]

    a blogger who did a lot of flatfoot work:

    http://www.markturner.net/2007/11/08/car-warranty-scam-continued/ [markturner.net]

    Remember: REMEMBER! Documented phone logs make diffrence. If you can document DNC and the call back time and date. Give them a call and get on their DNC list ANYWAY. So when they do call...

  • best approach (Score:3, Insightful)

    by Sloppy ( 14984 ) on Tuesday October 21, 2008 @01:09PM (#25455927) Homepage Journal

    If the Feds can't or won't handle it, what's the best approach here?

    Continue advocating the phase out of the legacy telephone system with its unreliable caller id info. The ideal way this stuff should work, is that if the incoming connection request isn't OpenPGP-signed by someone you have some sort of WoT path to, then you don't know who it is.

    We've had the tech to solve The Big Authentication Problem for a couple decades now (thanks, Phil!). We just need to start using it, for voice, email, etc.

    Some well-intending anti-telemarketing folks have posted her address on the 'net as well.

    You are giving them too much credit. Caller ID is widely known, even to many laymen now, to be unreliable. (And someone who makes a point of going after scammers has little excuse for being behind the curve on this.) They don't really have strong reason to believe she is the scammer. To do such a thing without checking their facts is irresponsible and possibly libelous. I wouldn't sugarcoat their actions.

  • by Phil_at_EvilNET ( 569379 ) on Tuesday October 21, 2008 @01:14PM (#25455987) Homepage

    The US Senate Committee on Commerce, Science, and Transportation passed S. 704, a bill that would make it a crime to spoof caller ID.

    Dubbed the "Truth in Caller ID Act of 2007," the bill would outlaw causing "any caller identification service to transmit misleading or inaccurate caller identification information" via "any telecommunications service or IP-enabled voice service." Law enforcement is exempted from the rule.

    Specifically these sections:

    SEC. 2. PROHIBITION REGARDING MANIPULATION OF CALLER IDENTIFICATION INFORMATION.

    Section 227 of the Communications Act of 1934 (47 U.S.C. 227) is amended -

    (1) by redesignating subsections (e), (f), and (g) as subsections (f), (g), and (h), respectively; and

    (2) by inserting after subsection (d) the following new subsection:

    `(e) Prohibition on Provision of Inaccurate Caller Identification Information. -

    `(1) IN GENERAL - It shall be unlawful for any person within the United States, in connection with any telecommunications service or IP-enabled voice service, to cause any caller identification service to knowingly transmit misleading or inaccurate caller identification information with the intent to defraud, cause harm, or wrongfully obtain anything of value, unless such transmission is exempted pursuant to paragraph (3)(B).

    `(3) REGULATIONS -

    `(A) IN GENERAL - Not later than 6 months after the enactment of this subsection, the Commission shall prescribe regulations to implement this subsection.

    `(B) CONTENT OF REGULATIONS -

    `(i) IN GENERAL - The regulations required under subparagraph (A) shall include such exemptions from the prohibition under paragraph (1) as the Commission determines is appropriate.

    `(ii) SPECIFIC EXEMPTION FOR LAW ENFORCEMENT AGENCIES OR COURT ORDERS - The regulations required under subparagraph (A) shall exempt from the prohibition under paragraph (1) transmissions in connection with -

    `(I) any authorized activity of a law enforcement agency; or

    `(II) a court order that specifically authorizes the use of caller identification manipulation.

    Law enforcement is negligent if they fail to take action. IMO - If the Law doesn't work, the local newspaper and/or television station might get the ball rolling.

  • SOLUTION (Score:3, Interesting)

    by RJBeery ( 956252 ) <rjbeery@gmai l . c om> on Tuesday October 21, 2008 @01:15PM (#25456005)
    I'm a marketing consultant and I've dealt with the auto warranty industry extensively. We (they) have recently started a new watch-dog group called the Automotive Warranty and Service Contract Association, and one of their purposes is to stop the "robo-calling" and caller ID spoofing. Have your friend send an email to Larry Hecker, Executive Director of AWSCA. His email is [his first name] at warrantybestpractices dot com. Good luck!
  • Some ideas (Score:3, Informative)

    by vinn ( 4370 ) on Tuesday October 21, 2008 @01:16PM (#25456023) Homepage Journal

    First off, I like the idea of intercepting this with an auto attendant, I think that's the simplest and most important thing you can do in the short term. I think you could ask your local telco if they can put an intercept message on the line - that should be completely possible. If not, look for some kind of device that will pick up, play back a recorded message, then pass the call on to the phone. A service like this would work well but costs money:

    http://www.americanvoicemail.com/autoattendant.html

    Or, you can probably do some call forwarding tricks, but that will require switching the number to a different carrier because a regular 1FR line won't do the necessary tricks.

    Oh, and some idiot on this forum is going to suggest doing some tricks with Asterisk - ignore them because it's 20 times more work than you need to do and in the end it's just going to confuse her.

    To really nab these guys, you're going to need to some how trace it back to the origin, and that's going to be damn hard. If you can't get a callback number to trace it with, then it would be nice if you could some how get ANI (automatic number identification) information. And that could be possible. Do it this way: find an agreeable caller who'll work to help nab this guy. Then get them to go to their telco and request their phone records get pulled and the ANI from the phone call retrieved. Then go to the telco's with that ANI and find out who owns it. Anyone can spoof caller ID, but it takes some real magic to spoof ANI. (Unfortunately some carriers toss away ANI records and translate caller ID to ANI, so be careful. It may take a few interations to get that info.)

    Now, that's still probably not going to work. I have no doubt these guys are offshore and using a VOIP box (probably Asterisk, lol). The VOIP calls terminate to a VOIP carrier in the US with an account that was set up under some fraudulent information. Then that VOIP carrier is peered with the real telco's via some regular old PRI's and that's the ANI information you'll get. However, I have no doubt that somewhere, some how a bill is generated and paid for, so if you can get to the VOIP carrier, you might be able to track this down.

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