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  2. ZIP Code - Wikipedia

    en.wikipedia.org/wiki/ZIP_Code

    A ZIP Code (an acronym for Zone Improvement Plan[1]) is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly [2] (zipping along) when senders use the code in the postal address. Introduced on July 1, 1963, the basic format comprised five ...

  3. List of ZIP Code prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_ZIP_Code_prefixes

    The 925 prefix originally covered only Riverside, California. The surrounding offices were originally under the 923 prefix. The present-day 926 prefix range only covers the southern and coastal portion of Orange County. This includes, Irvine, which originally had only ZIP Code, 92650.

  4. Discontinued post office - Wikipedia

    en.wikipedia.org/wiki/Discontinued_post_office

    A discontinued post office or DPO is an American postal term for a post office which is no longer in service or is in service under another name. [1][2] Some are in ghost towns, some victims of consolidation of mail service as small post offices are closed or a city expands. The introduction of Rural Free Delivery, RFD, in 1902 led to the ...

  5. Military mail - Wikipedia

    en.wikipedia.org/wiki/Military_mail

    Military mail, as opposed to civilian mail, refers to the postal services provided by armed forces that allow serving members to send and receive mail. Military mail systems are often subsidized to ensure that military mail does not cost the sender any more than normal domestic mail. In some cases, military personnel in a combat zone may post ...

  6. Richest and Poorest ZIP Codes in America - AOL

    www.aol.com/finance/richest-poorest-zip-codes...

    The ZIP codes then were entered into a search from the United States Postal Service ZIP Code Finder to find the city associated with the ZIP code. All data was collected on and is up to date as of ...

  7. List of postal codes - Wikipedia

    en.wikipedia.org/wiki/List_of_postal_codes

    NNNNN, NNNNN-NNNN. U.S. ZIP codes. ZIP codes 006XX for NW PR, 007XX for SE PR, in which XX designates the town or post office and 009XX for the San Juan Metropolitan Area, in which XX designates the area or borough of San Juan. The last four digits identify an area within the post office.

  8. List of highest-income ZIP Code Tabulation Areas in the ...

    en.wikipedia.org/wiki/List_of_highest-income_ZIP...

    v. t. e. The following is a list of the highest-income ZCTAs in the United States. ZCTAs or ZIP Code Tabulation Areas are the census equivalent of ZIP codes used for statistical purposes. The reason why regular ZIP codes are not used is because they are defined by routes rather than geographic boundaries. Thus, they have the tendency to overlap ...

  9. Delivery point - Wikipedia

    en.wikipedia.org/wiki/Delivery_point

    In a database, storing the ZIP+4 code in a 10 character field (with the hyphen) allows easy output in the address block, and storing the check digit in a 3-digit field (instead of calculating it) allows automatic checking of the validity of the ZIP+4 and delivery point fields in case one had been changed independently.