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PLANETMonitor
WHAT IS A PLANET CODE?
A PLANET Code is a 12 or 14-position barcode designed by the USPS specifically for the Confirm Program. As with the POSTNET Code, framing bars must be placed at the beginning and end of the barcode.

As mail travels through the postal system the PLANET and POSTNET barcodes are scanned by the USPS's automated mail sorting equipment. The PLANET Code and POSTNET code, along with the date and time of the scan, the postal location and the USPS Operation Code, are captured and sent to U.S. Monitor. Scan data is received, and imported, by U.S. Monitor several times a day.
THE ORIGIN (OUTBOUND) 12-POSITION PLANET CODE:
THE DESTINATION (RETURN) PLANET CODE: