USPS Intelligent Mail Properties

United States Postal Service (USPS) Intelligent Mail® is a suite of barcode symbologies.

  • For Intelligent Mail barcodes (IMb™) for mailpieces (letters, cards, and flats), use the USPS Intelligent Mail symbology.
  • For Intelligent Mail Tray barcodes, use either Code 128 symbology with Start Code C or Interleaved 2 of 5 symbology.
  • For Intelligent Mail Container barcodes, use the GS1-128 symbology with Start Code C or B.
  • For Intelligent Mail Package barcodes (IMpb), use the GS1-128 symbology with Start Code C.

The USPS Intelligent Mail barcode for mailpieces is a 4-state barcode that consists of 65 bars that can encode up to 31 digits. The following information can be included:

  • Barcode Identifier
  • Service Type Identifier (STID)
  • Mailer Identifier (MID)
  • Serial Number
  • Routing Code, also referred to as a ZIP Code or a delivery-point code

The USPS Intelligent Mail symbology in Loftware Enterprise SP supports all formats for Intelligent Mail barcodes for mailpieces. Those formats include using a 6-digit Mailer Identifier, a 9-digit Mailer Identifier, or the Origin IMb Tracing Intelligent Mail Barcode Format.

For more information about encoding USPS Intelligent Mail barcodes, see the USPS entry listed in External Links.

Property Description Values
Symbol Size Changes the relative height and width of all bars in the symbol.

Small

Medium

Large