Search for a tool
Barcode POSTNET

Tool to generate/decode POSTNET barcodes. POSTNET (Postal Numeric Encoding Technique) is a barcode standard used in the United States for mail routing.

Results

Barcode POSTNET -

Tag(s) : Character Encoding, Image Processing

Share
Share
dCode and more

dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!


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


Feedback and suggestions are welcome so that dCode offers the best 'Barcode POSTNET' tool for free! Thank you!

Barcode POSTNET

Barcode POSTNET Generator

 






Options









Barcode POSTNET Reader/Decoder


Loading...
(if this message do not disappear, try to refresh this page)


See also: Binary Code

Answers to Questions (FAQ)

How to encrypt using Barcode POSTNET cipher?

The POSTNET Barcode format allows coding only numbers. It generally contains the ZIP postal code (5 digits) and sometimes 4 additional digits (ZIP+4) for the Delivery point (DP) which corresponds to an even more precise mail collection point.

Each digit is coded in 5 bits, represented by short or long bars. The POSTNET correspondence table is:

0 11000100011
200101300110
401001501010
601100710001
810010910100

A complete POSTNET barcode begins and ends with a bit 1 (long line), it also includes a check digit before the final 1.

How to decrypt Barcode POSTNET cipher?

The decryption of the POSTNET Code consists of reading binary short (= 0) and long (= 1) bands and then translating them via the coding table.

Example: A message 1 00011 00101 00110 1 translates to 123

POSTNET checksum is missing in this example

How to calculate the checksum characters?

The POSTNET code uses a basic checksum: add all the digits and keep the digit of units $ N $. The checksum is $ 10 - N \mod 10 $.

Example: The number 678 has for sum of digits $ 6+7+8 = 21 $, the unit digit is $ 1 $. The checksum is $ 10 - 1 = 9 $.

How to recognize POSTNET Barcode?

The POSTNET barcode has a graphic form made up of long and short lines.

The POSTNET barcode has a variable length.

The POSTNET barcode begins and ends with a long line.

The binary reading of the POSTNET barcode has a length equal to 2 modulo 5 (because 2 bits 1 are added both the beginning and at the end and the remaining characters are on 5 bits).

Source code

dCode retains ownership of the "Barcode POSTNET" source code. Except explicit open source licence (indicated Creative Commons / free), the "Barcode POSTNET" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "Barcode POSTNET" 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 "Barcode POSTNET" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app!
Reminder : dCode is free to use.

Cite dCode

The copy-paste of the page "Barcode POSTNET" or any of its results, is allowed as long as you cite dCode!
Cite as source (bibliography):
Barcode POSTNET on dCode.fr [online website], retrieved on 2022-12-09, https://www.dcode.fr/barcode-postnet

Need Help ?

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

Questions / Comments

Feedback and suggestions are welcome so that dCode offers the best 'Barcode POSTNET' tool for free! Thank you!


https://www.dcode.fr/barcode-postnet
© 2022 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaching / CTF.
 
Feedback