How to find who/where a fax is being sent from?

I work at an elementary school and someone has been sending hundreds of graphic/disturbingly inappropriate & mildly threatening faxes to our main office. I have reached out to local police & they just tell me to block them, but I really hesitate to do that because then if they send a genuine threat, I won’t see it. I already know the name of the individual (they live several states away) and I have the fax number, but I would like to know where they are faxing them from because im assuming it’s a workplace or another school since most people don’t have the ability to fax from their homes. Things like white pages haven’t been much help.

submitted by /u/nos-lo
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from hacking: security in practice https://ift.tt/5qRusFO

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