Do carriers still exist on the PSTN?

Hello all, whilst helping out another user find some old e-zines from the 90s H/P/V scene, I came across a zine which included some carrier scans.

For those too young to remember (or never watched WarGames) back in the day we'd run TONELOC on our machines overnight, which would call multiple phone numbers on the PSTN (Public Switched Telephone Network) looking for computers. Most of the numbers would be voice/fax but if it found a carrier it would write the number down in a log.

Purely out of interest, does anyone still try scanning the PSTN nowadays? And if so, are there still any computers connected to the PSTN?

submitted by /u/jddddddddddd
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from hacking: security in practice https://ift.tt/A3JPHtI