The Intelligent Mail barcode (IMb) is used to sort and track letters, cards and flats and offers greater versatility by allowing many services to be requested and embedded within one barcode.
The Intelligent Mail Barcode (IM barcode) is a 65-bar barcode for use on mail in the United States. The term "Intelligent Mail" refers to services offered by the United States Mail Service for domestic mail delivery. The IM barcode is intended to provide greater information and functionality than its predecessors.
IMB tracking numbers starting with "0031" (00310902097365396335) can be tracked with Pitney Bowes.
IMb Tracing reports the date, time, location, and processing information for each mail piece each time the mail runs on automated equipment.