- Used by U.S. Postal Service (USPS) mailstream
- Designed to sort and track mail deliveries, containing routing and tracking information
- Combines and improves functionalities of POSTNET and PLANET Code barcodes
- Allows providing multiple postal services with a single barcode
USPS Intelligent Mail barcode is height-modulated and it encodes up to 31 digits of mailpiece data. It consists of 65 vertical bars using a 4-state symbology (four types of bars, which are allowing for more information to be encoded in a single barcode)