Long before the internet, some phone networks were hackable by playing a single tone at 2600Hz.

Whistled into a phone, it could grant you unrestricted access. Do you have the vocal chops to be an old-school phone phreak?

I built a web app to test your ability to produce the legendary frequency. You won't get free long distance calls but you will get some honor in the knowledge that you could have been a cool hacker. 😎

I am sad to say that I can only whistle up to 1100Hz... But my wife (a long time woodwind player) is able to consistently get it.

Give it a try: https://phreak.kmcd.dev/

#phreaking #2600Hz #bluebox #RetroComputing #hacker #infosec #Tech

Josef Carl Engressia Jr., aka: Whistler, later known as Joybubbles, was a blind phone phreaker with the extraordinary gift of absolute pitch. He could whistle a perfect 2600 Hz tone, the exact frequency needed to manipulate AT&T’s phone system. Without using any devices, he could seize control of long-distance calls just by whistling into the handset.

In 1971, Engressia became the first phreaker to face legal consequences when he was arrested and fined twenty-five dollars for phone fraud. Despite this, he remained a legendary figure in phreaking culture. Later in life, he legally changed his name to Joybubbles.

#Phreaking #2600Hz #Joybubbles #PhoneHacking #HackerHistory

@lerothas @n_to ich kaufe staendig muesli, in der hoffnung auf diese pfeife ;)

#2600Hz

By © [email protected], CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=44260782

TIL: diese Pfeifen, die z.B. @wirsindverdi bei Streiks verteilen, erzeugen mit der kurzen Seite ca. 2900Hz (uninteressant) und mit der längeren ziemlich gut #2600Hz

Schade! Mit 2400 und 2600 wär das ein (paar Jahrzehnte verspätetes) nettes Nerdtool gewesen

When you spot two payphones about a block from one another, and of course neither have a dial tone!

#payphones #2600hz #phreak