<div dir="auto"><div>Google has built a rating system into Android devices. It shows "likely spam" or something similar. In addition to blocking the number you can now report it as spam (much like emails received via Gmail).</div><div dir="auto"><br></div><div dir="auto">Not sure if they are building their own database from scratch or using one of the two below.</div><div dir="auto"><br></div><div dir="auto">I am also not sure how effective CLI blocking will be in terms of reducing unwanted calls. The originator can easily change the caller number on each dial.</div><div dir="auto"><br></div><div dir="auto">The only thing I see working is carriers penalizing the originating party/carrier by deactivating services on complaints-driven basis.</div><div dir="auto"><br></div><div dir="auto"><br><div class="gmail_extra" dir="auto"><br><div class="gmail_quote">On May 12, 2017 10:50 PM, "Ryan Delgrosso" <<a href="mailto:ryandelgrosso@gmail.com">ryandelgrosso@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
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    <p>Most likely either nextcaller or whitepages. Both have telephone
      reputation API's that are trivial to build such services around. <br>
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    <div class="m_6310942253810931485moz-cite-prefix">On 5/12/2017 2:01 PM, Aryn Nakaoka
      <a href="tel:(808)%20356-2901" value="+18083562901" target="_blank">808.356.2901</a> wrote:<br>
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      <div dir="ltr">T-mobile changes the cnam of a call to "Scam
        Likely" based on incoming DID.
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        <div>Does anyone know what list they are using and where to get
          it?<br clear="all">
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                      <br>
                      Aryn H. K. Nakaoka<br>
                      <a href="mailto:anakaoka@trinet-hi.com" target="_blank">anakaoka@trinet-hi.com</a><br>
                      <br>
                      Direct: <a href="tel:(808)%20356-2901" value="+18083562901" target="_blank">808.356.2901</a><br>
                      Fax: <a href="tel:(808)%20356-2919" value="+18083562919" target="_blank">808.356.2919</a><br>
                      <br>
                      Tri-net Solutions<br>
                      518 Holokahana Lane Suite #200<br>
                      Honolulu, HI 96817<br>
                      <a href="http://www.trinet-hi.com" target="_blank">http://www.trinet-hi.com</a><br>
                      <br>
                      <a href="https://twitter.com/AlohaTone" target="_blank">https://twitter.com/AlohaTone</a><br>
                      <br>
                      Aloha Tone PBX  <a href="https://www.youtube.com/watch?v=96YWPY9wCeU" target="_blank">https://www.youtube.com/<wbr>watch?v=96YWPY9wCeU</a><br>
                      <br>
                      Aloha Tone (HA) High Availability <a href="http://youtu.be/rJsr4k0RBH8" target="_blank">http://youtu.be/rJsr4k0RBH8</a></div>
                    <div><br>
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                    <div>A Better Solution <a href="https://www.trinet-hi.com/abettersolution.pdf" target="_blank">https://www.trinet-hi.com/<wbr>abettersolution.pdf <br>
                      </a><br>
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