USPS POSTNET barcode generator
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About USPS POSTNET
USPS POSTNET (POSTal Numeric Encoding Technique) is a predecessor to Intelligent Mail that encoded ZIP codes as tall and short bars. Deprecated in 2013.
Valid input
- US 5-digit ZIP, 9-digit ZIP+4, or 11-digit DPBC.
- Deprecated since 2013 - use Intelligent Mail (onecode) for new mailings.
Related barcode types
Guides
- How to Print Barcode Labels That Actually Scan
DPI, X-dimension, quiet zone, and the handful of print settings that decide whether your label works. A practical guide for anyone printing labels at real volume.
- Why Won't My Barcode Scan? A 7-Step Checklist
A checklist for diagnosing barcode scan failures, covering quiet zones, contrast, print resolution, physical damage, wrong symbology, check digits, and scanner distance.