Postnet Barcode (Postal Numeric Encoding Technique)

Postnet barcode is widely used by the U.S Postal Service. It is a numeric symbology that uses five bars and four spaces. A constant width and spacing is used throughout the symbol. It is a clocked technology in which a scan through the bottom of the bars provides a timing track.

Postnet barcode encodes data in half and full-height bars. Most often, the delivery point is added, usually being the last two digits of the address or PO box number.

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