Postal Numeric Encoding Technique used to encode ZIP code information on letter mail. PostNet utilizes redundant information within a compact bar code format to provide error detection capability and a significant degree of error correction capability.

Barcode See Barcode

POSTNET is a barcode symbology that is used by the United States Postal Service to assist in directing mail. The ZIP Code or ZIP+4 code is encoded in this unique symbology that 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.