Tool to decrypt/encrypt DTMF codes. Dual-tone multi-frequency DTMF codes are combinations of sound frequencies used in phones when dialing numbers.
DTMF Code - dCode
Tag(s) : Telecom, Substitution Cipher
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A DTMF code for dual-tone multi-frequency, is the name given to a combination of sound frequencies (beep) emitted by the keys of a telephone keypad. They are used by voice servers and for dialing numbers.
DTMF codes are used by phones and can be used to substitute numbers with their sound wave frequency as described in the table:
|1209 Hz||1336 Hz||1477 Hz||1633 Hz|
Decryption is a simple reverse substitution, for each frequency, a digit or a letter is associated.
The site here (link) allows to decrypt directly from an audio file.
There are only 8 frequencies: 697 Hz, 770 Hz, 852 Hz, 941 Hz, 1209 Hz, 1336 Hz, 1477 Hz and 1633 Hz.
DTMF stands for dual-tone multi-frequency and translates sometimes into Vocal Frequencies.