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The UPU S10 standard defines a system for assigning 13-character identifiers to international postal items for the purpose of tracking and tracing them during shipping. The standard was introduced on 18 April 1996, [ 1 ] : 4 and is currently in its 12th version.
It is a unique ID number or code assigned to a package or parcel. The tracking number is typically printed on the shipping label as a bar code that can be scanned by anyone with a bar code reader or smartphone. In the United States, some of the carriers using tracking numbers include UPS, [1] FedEx, [2] and the United States Postal Service. [3]
A possible Intelligent Mail Barcode for the Wikimedia Foundation address. The Intelligent Mail Barcode (IMb) is a 65-bar barcode for use on mail in the United States. [1] The term "Intelligent Mail" refers to services offered by the United States Postal Service for domestic mail delivery.
A PLANET barcode appears either 12 or 14 digits long. The barcode: identifies mailpiece class and shape; identifies the Confirm Subscriber ID; includes up to 6 digits of additional information that the Confirm subscriber chose, such as a mailing number, mailing campaign ID or customer ID
The service became quickly popular: for UPS the number of packages tracked on the web increased from 600 a day in 1995 [9] to 3.3 million a day in 1999. [10] On-line package tracking became available for all major carrier companies, and was improved by the emergence of websites that offered consolidated tracking for different mail carriers. [11]
Contrary to popular belief, [dubious – discuss] Tracking is not accepted as proof of mailing in nearly all legal situations. [citation needed] The service also allows the receiver to track their package/envelope through the online system at usps.com using the unique tracking number provided by the mailer. [15]
There have been four formats of Postnet barcodes used by the Postal Service: A 5 digit (plus check digit) barcode, containing the basic ZIP Code only, referred to as the "A" code. 32 bars total. A 6 digit (plus check digit) barcode, containing the last 2 digits of the ZIP Code and the 4 digits of the ZIP+4 Code, referred to as a "B" code.
The FIM is intended for use primarily on preprinted envelopes and postcards and is applied by the company printing the envelopes or postcards, not by the USPS. The FIM is a nine-bit code consisting of ones (vertical bars) and zeroes (blank spaces). The following five codes are in use: FIM A: || | || (110010011) FIM B: | || || | (101101101)