USPS POSTNET

Barcode Generator

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A magnifying glass with mail coming out of it, hovering over a map.

POSTNET or Postal Numeric Encoding Technique was developed by the USPS to encode zip code information to improve speed, accuracy, and delivery of mail. It allows for rapid and reliable sorting by barcode sorters and provides additional automation discounts for bulk mailings.

CDYNE's Postal Address Verification API automatically generates the data for a POSTNET barcode for each address. It is appended in the “PostnetBarcode” field. The data return includes Zip + 4 code, two-digit delivery point code, and the delivery point check digit.

CDYNE PAV Web Service also includes Intelligent Mail barcode return data.