Description of 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 constructed as follows:
- Start character
- Check digit
- Stop character
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 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
The check digit of the PostNet barcode is not displayed in the plain text line.
variable (no fixed length)
Calculated according to (see description)
ActiveBarcode calculates the check digit for you automatically
PostNet - #18 - CODEPOSTNET