Planet
Planet codes are clocked codes used within the US Postal Service for the confirmation of incoming or outgoing mail.
Planet_OC
Planet codes consist of 9 or 11 digits prefixed by a code to indicate which Origin Confirm or Destination Confirm service is required, and postfixed by a mandatory Mod 10 check digit. The dLSoft library automatically provides the check digit. There is no text content associated with these codes.
Plessey