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The first part is the first five digits of the zip code which indicates the destination post office or delivery area. The last 4 digits of the nine-digit ZIP Code represents a specific delivery route within that overall delivery area. All 9 digits of a full zip code assist the USPS in effectively sorting the mail.
Easy, just visit USPS.com, hover over the Mail & Ship top menu tab, and select Look Up a ZIP Code. Enter your address (with apartment number, if any), hit Find, and your full address with ZIP+4 will display.
ZIP+4 Codes are the last 4 digits of a nine-digit ZIP Code. A nine-digit ZIP Code is made of two parts. The first part is the first five digits of the zip code which indicates the destination post office or delivery area.
USPS Priority Express Mail is guaranteed and takes 1-2 days depending on your zip code.
Usage. While the USPS requires the five-digit ZIP Code for second- and third-class mail, it does not require you to use the ZIP +4. Business mailers primarily use the extra four digits for quicker processing.
In 1967, ZIP codes became mandatory on all mail. A ZIP code is a five-digit number representing a specific location in the United States. ... The fourth and fifth digits represent more specific areas, like post offices and postal delivery zones within a city or town.
As of 1963, zip codes' numbers are determined by a few factors: the area, the regional postal facility and the local zone. The first number of the five-digit code signifies the region which the address is located in, a number that grows from the east coast to the west.
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