• KairuByte@lemmy.dbzer0.com
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    1 year ago

    It really depends on how liberal you are with your phone number. Do you give it to everyone and anyone? Because once it’s on a spam call list, it stays there for a long while. Even after it’s “tested bad” it gets circulated through to other spammers.

    Eventually it will fall off, but it takes years in some cases. And you need to be pretty vigilant with your screening to get there.

    • kalleboo@lemmy.world
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      1 year ago

      I always assumed they just called every single number randomly. Since you don’t pay for failed calls, the cost is zero.

      • KairuByte@lemmy.dbzer0.com
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        1 year ago

        Some likely do, but there are other types of responses they will get that do cost. Such as answering services, fax machines, and even dialup endpoints. It’ll always be more cost effective to use a shared list of “good” numbers.