Machine-readable postal marking

Machine-readable postal marking may refer to:

• POSTNET, Postal Numeric Encoding Technique, which encodes ZIP codes, ZIP+4 codes and (optionally) delivery points
• Postal Alpha Numeric Encoding Technique, PLANET, barcode used by the U.S. Postal Service
• Facing Identification Mark, a bar code designed by the U.S. Postal Service
• Intelligent Mail barcode, replaces POSTNET and PLANET
• Identification Code Tracking