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Phone Keypad Cipher

Tool to decrypt/encrypt messages with a mobile phone keypad. Phone keypads allow you to write messages in several ways: Multi-tap, ABC code, T9 code, Vanity, etc. and can be used as a cipher.

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Phone Keypad Cipher -

Tag(s) : Telecom, Substitution Cipher

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NB: for encrypted messages, test our automatic cipher identifier!


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Phone Keypad Cipher

ABC or Multi-tap Code

The Multi-tap code is the name given to the telephone input technique that consists of writing a letter by repeating the corresponding key on the mobile phone keypad. For example: '2' for 'A', '22' for 'B', '222' for 'C', '3' for D, and so on 'CODE' is written '222-666-3-33'. dCode has a tool for that:

T9 Code (Predictive text)

T9 code is the name given to the prediction algorithm that uses a dictionary to guess the word the user is trying to write. For example: '2' for 'A' or 'B' or 'C', '222' for 'BAC' or 'ABC'. 'CODE' is written '2633'. dCode has a tool for that:

Answers to Questions (FAQ)

What are phone keypad codes? (Definition)

Telephone keypad codes are the alphanumeric codes for writing text from the keys of a telephone keypad (old 10 or 12 key version). There are 2 modes that coexist but are incompatible: the ABC or Multi-tap mode on the one hand, which allows you to write a character by repeating a key , and the T9 mode on the other which uses a dictionary to avoid key repetition and achieve intuitive typing.

What is the configuration of the keys on a phone keypad?

By default, on a mobile keypad (smartphone, iphone), letters are associated to digits according to this arrangement:

1various symbols
2ABC
3DEF
4GHI
5JKL
6MNO
7PQRS
8TUV
9WXYZ
*star/asterisk and other symbols
0space (but not always)
#sharp and other symbols
keypad

How to recognize T9 mode?

T9 has short numbers, whose length is equal to the letter number in the word. There is little repetition of the same digit. This is the fastest way to type SMS without abbreviations.

Example: MESSAGE=6377243

How to recognize ABC mode?

The ABC multitap has long numbers (much longer than the original word), with many repetitions of consecutive digits (successive presses on the same key). This is the quickest way to type text messages with abbreviations.

Example: MESSAGE=633777777772433

What is the Vanity code?

The Vanity code is the name given by the English-speaking people to the above codes. Some give it for T9 mode, others for ABC / Multitap mode.

Source code

dCode retains ownership of the "Phone Keypad Cipher" source code. Except explicit open source licence (indicated Creative Commons / free), the "Phone Keypad Cipher" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, breaker, translator), or the "Phone Keypad Cipher" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, or API access for "Phone Keypad Cipher" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app!
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Phone Keypad Cipher on dCode.fr [online website], retrieved on 2024-06-15, https://www.dcode.fr/phone-keypad-cipher

Need Help ?

Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!

Questions / Comments

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