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  2. Package tracking - Wikipedia

    en.wikipedia.org/wiki/Package_tracking

    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]

  3. List of United States post offices - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States_post...

    Several United States post offices are individually notable and have operated under the authority of the United States Post Office Department (1792–1971) or the United States Postal Service (since 1971). Notable U.S. post offices include individual buildings, whether still in service or not, which have architectural or community-related ...

  4. J. W. Westcott II - Wikipedia

    en.wikipedia.org/wiki/J._W._Westcott_II

    J. W. Westcott II is a post office boat that delivers mail to ships while they are underway. It operates out of Detroit, Michigan, and, as it is an official post office for the United States Postal Service, it also contains the only floating ZIP Code in the United States—48222.

  5. U.S. Special Delivery (postal service) - Wikipedia

    en.wikipedia.org/wiki/U.S._Special_Delivery...

    In 1977, the Postal Service introduced Express Mail; the two services operated concurrently for the next 20 years. [7] On June 7, 1997, the United States Postal Service terminated Special Delivery mail service [8] which left many unused Special Delivery stamps in circulation that were no longer valid for such postage. The remaining stamps were ...

  6. Look inside the overhauled Tri-Cities postal sorting center ...

    www.aol.com/news/look-inside-overhauled-tri...

    The U.S. Post Office in Pasco is among the first in the nation to get a high tech update through the 10-year Delivering for America plan. It’s an update that officials hope will speed up Tri ...

  7. Intelligent Mail barcode - Wikipedia

    en.wikipedia.org/wiki/Intelligent_Mail_barcode

    This section of the code may be omitted, but if it is present, the 5-, 9-, or 11-digit forms of the ZIP Code are also encoded in the Intelligent Mail barcode. The full 11-digit form includes the standard 5-digit ZIP code, the ZIP + 4 code, and a 2-digit code indicating the exact delivery point. This is the same information that was encoded in ...

  8. ZIP Code - Wikipedia

    en.wikipedia.org/wiki/ZIP_Code

    In 1983, the U.S. Postal Service introduced an expanded ZIP Code system that it named ZIP+4, often known as "plus-four codes", "add-on codes", or "add-ons". A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an ...

  9. POSTNET - Wikipedia

    en.wikipedia.org/wiki/POSTNET

    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.