What do the digits in the PLANET Code® represent?
The first two digits indicate the type of PLANET Code® and the size and class of the mail piece. Destination, outgoing PLANET Code®’s start with a number from 40-45. Origin, incoming PLANET Code®’s start with 50-55. The next 5 digits are the account number assigned to trackmymail.com by the Postal Service™. The next four digits are the numbers we use to identify a particular mailing, and the last digit is a “correction” digit. The sum of all digits must end with “0”. The correction digit makes certain that this happens.
