Online USPS Mail Barcode Maker


Barcode Data: 

( Up To 100 Rows )

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from Excel sheet, then

paste to this text box.

Numbers 0-9, Uppercase Letters A-Z, 65 Digits

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Intelligent Mail Barcode (IMb) is a barcode used in U.S. mail. The term "Smart Mail" refers to the service provided by the United States Postal Service for domestic mail delivery.

Intelligent Mail Barcode is a highly modulated barcode used to sort and track mail. It can encode up to 31 decimal digits divided into 65 vertical bars. It consists of four different symbols, hence it was once called the 4-State Customer Barcode.

Its historical origins date back to the 1980s, when the United States Postal Service began using POSTNET barcodes to automatically identify postal codes for mail. In 1996, the U.S. Postal Service introduced the PLANET barcode to track the delivery status of mail. In 2003, the U.S. Postal Service began developing a new barcode that combined the capabilities of POSTNET and PLANET and added more information capacity and security. This is the prototype of Intelligent Mail Barcode.

In 2006, the United States Postal Service officially released the specifications for Intelligent Mail Barcode, and began full implementation in 2009. It allows mail senders to participate in multiple Postal Service programs simultaneously using a single barcode and expands tracking capabilities for individual pieces of mail, improving visibility into mail flow.

It effectively combines routing postal code and tracking information contained in previously used postal barcode standards.

IM barcodes are designed to provide richer information and functionality than their predecessors, POSTNET and PLANET.

Intelligent mail barcodes are also known as single-code solutions and 4-state customer barcodes, abbreviated as 4CB, 4-CB or USPS4CB. Complete specifications can be found in USPS document USPS-B-3200.

IM barcodes are affixed to mails by the sender. Effective January 28, 2013, the Postal Service requires the use of smart mail barcodes to qualify for automated pricing.

The use of IM barcodes can improve overall efficiency, including improved delivery capabilities and new services.


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