Barcode Technology - POSTNet Barcode               Hide the description

The PostNet (Postal Numeric Encoding Technique) is a code by the US Post Office. It encodes the zip of the

addressee in a machine readable format. This improves the speed of sorting and delivering the mail..

The PostNet barcode is used mainly in 3 variants, that differ in the length of the data:

5 digits POSTNET barcode:  5 digit long zip code
ZIP + 4 POSTNET barcodes:  9 digit long zip code
DPBC POSTNET barcode (Delivery Point barcode):  9 digit long zip code + 2 DPBC digits.

Valid characters: 0123456789

POSTNet is one of the many barcode formats currently in use.

A Barcode is a method of representing data in a visual, machine-readable form.

The barcode formats has two categories:

One-dimensional (1D) --- Barcodes represented data by varying the widths and spacings of parallel lines.

Two-dimensional (2D) --- Using rectangles, dots, hexagons and other geometric patterns to represented data.

Check digit:

The check digit is calculated as follows: First add all digits. The difference of this sum to the next multiple of 10 is the check digit. The check digit of the PostNet barcode is not displayed in the plain text line.

The check digit is chosen so that the sum of all digits in the bar code is a multiple of 10. Equivalently, the modulo-10 sum is 0.
To calculate the check digit:
Add up the digits. For example, if a letter is sent to Young America, Minnesota, it might be sent to 55555-1237, which would have the sum of 38.
Find the remainder of this number when it is divided by 10, in this case 8. This is also known as the sum modulo 10. A simple way to combine the two steps is to sum the digits without a tens column at all, but discard all carries.
Subtract the sum modulo 10 from 10. Continuing with the example, 10 − 8 = 2. The check digit is therefore 2.
If calculated correctly, the sum of the ZIP, ZIP+4, or ZIP+4+delivery point digits and the check digit will always be a multiple of 10. Continuing with the example above, (5+5+5+5+5+1+2+3+7+2) = 40, and 40 mod 10 = 0.
Note that the Delivery Point is often added after the ZIP+4 and before the check digit, in which case the computation of the check digit includes the ZIP+4 and the Delivery Point.

Human Readable:

Most barcodes display their corresponding values below them, which makes it possible to human read and manually  enter the barcode values into the equivalent system when the barcode label is worn out and cannot be read by the barcode scanner.

The Advantages of using barcodes:

If you want to reduce costs and save time, using barcodes is a good choice. Whether you are a company or a non-commercial organization, to improve efficiency and reduce overhead, barcodes are a valuable and viable option, which is economical and reliable.

Using Barcode system eliminates the possibility of human error. The error rate of manually entering data is
significantly higher than that of scan barcodes. Barcode scanning is fast and reliable, and it takes much less time than manual data entry. Especially when using a QR code, hundreds of characters can be read and entered into your system instantly.

When barcodes are used in management information systems, they can promote better decision-making. Because data is obtained quickly and accurately, you can quickly obtain a full range of information for the entire company or organization, so it is possible to make more informed decisions. Better decisions can ultimately save time and money.

Barcodes are cheap and user-friendly, providing an indispensable tool for tracking data from pricing to inventory. The end result of a comprehensive bar code system is reduced overhead.

 http://barcode.design/ - For Online

 http://Free-Barcode.com/ - For PC

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