barcode is a barcode used by the Postal Service for use in the
United States Postal Service's (USPS) mail tracking system.
barcode was developed by the USPS in 1997. It is based on the
POSTNET barcode and adds some extra bars and spaces to provide
more information and functionality.
PLANET barcode is
the abbreviation of (Postal Automated Redirection System and
Tracking Network), which can be used to track the delivery
status, forwarding address, return address, etc. of mail.
barcode has been phased out by the United States Postal Service
(USPS) and replaced by a new barcode called the (Intelligent
consist of 12 or 14 digits, of which the first and last digits
are check digits used to detect errors. The middle 10 or 12
digits are divided into two parts. The first 5 or 6 digits
indicate the destination of the email, and the last 5 or 6
digits indicate the serial number of the email.
uses two different widths of bars and spaces to represent
numbers, where narrow bars and narrow spaces represent 0, and
wide bars and wide spaces represent 1. Each number consists of 5
bars and spaces.
For example, 0
means "narrow narrow narrow narrow narrow", 1 means "wide narrow
narrow narrow narrow narrow", and so on.
It consists of 12
digits, each digit corresponds to a long or short bar, the long
bar represents 1, and the short bar represents 0.
Its first two
digits indicate the mail type, such as 01 for priority mail, 02
for standard mail, etc.
Its last 10
digits indicate the mail destination, which is the zip code and
post office number.
It has a start
character and a terminator at both ends, which are a long bar
and a short bar respectively.